It was millions of years ago when man's curiosity about the world began. For almost 20 centuries past, man had explored almost the corners of the earth and the universe. Within this period, man had built countless skyscrapers, long bridges and famous expressways that only proved the cleverness of man. With this advancement in the field of technology, do you ever imagine what would be the future of the world and the kind of lives of the next generations? What indeed would be the future of mankind 10 centuries from now?
Because of the high intelligence of man he discovers new things that can help him in his everyday life. Many of our works/jobs become easier and faster through the help of the latest machines. Many of the deadly diseases are prevented or cured through the continued studies and discoveries in the field of medicine. Some of our body parts can already be artificially replaced. We can even go to such length as deceive time and postpone the inevitable.
Despite these achievements' however, our mother earth is in danger. Because of the ambitions of mankind, they had neglected the disadvantages that come with most of their discoveries and inventions. Many of our rivers, seas, oceans, and other bodies of waters are now polluted by different toxics emitted by mining companies, metal and plastic industries and pharmaceutical factories.
Our atmosphere is heavily loaded with carbon monoxide and other poisonous gases from vehicles and machineries. Our ozone layer is continually being destroyed as days pass by. The continued study and inventions of biological and nuclear weapons and power plants had killed hundred of lives and threatened unimaginable destruction among mankind and its habitat.
If all these things and advancement continue, there is a huge possibility that time will come when robots and clones will invade our homeland. It may result to the destruction of the earth. All of these can result to the extinction of thousands of different species including us, mankind.
Advancement is not bad. But before doing anything be sure to think of the grave consequences and huge disadvantages of a particular discovery. Too much advancement may lead to the destruction of our world and mankind. Always bear in mind that there is only one place where man can live and survive, the EARTH.
Showing posts with label education. Show all posts
Showing posts with label education. Show all posts
Tuesday, April 15, 2008
Thursday, April 10, 2008
"BRAIN TWISTER"
Plz arrange diz scrambled words to form a 3 english word...
" M U E E Y C O T M P O E L "
CLUE:
If you are satisfied and contented with your love one,
im sure you can say this !!
Tuesday, April 8, 2008
The history of chocolate...
The Olmecs, the oldest known civilization of the Americas, were the first users of cacao. Cacao is, of course, used for making chocolate, a word said to derive from the Mayan "xocolatl."
Hernando Cortez was the first European to note chocolate when he visited the court of Emperor Montezuma of Mexico in 1519.
The first chocolate house in Europe was reputedly opened in London in 1657 by a Frenchman. In the early 19th century, after the introduction of cocao powder in 1828, the English developed solid eating chocolate.
The first chocolate box was introduced by Richard Cadbury in 1868, when he decorated a candy box with a painting of his young daughter holding a kitten in her arms. Cadbury also introduced the first Valentine's Day candy box.
In 1875, after experimenting for 8 years, Daniel Peter of Switzerland added milk to chocolate to create today's familiar chocolate. His then sold his creation to his neighbour, Henri Nestle.
The 17th century French Cardinal Mazarin never traveled without his personal chocolate maker. King Louis XIV of France established in his court the position of "Royal Chocolate Maker to the King."
The chocolate chip cookie is invented by Ruth Wakefield in 1933. M&M sweets were launched in military ration packs in 1940.
In 1973, Swedish confectionery salesman Roland Ohisson was buried in a coffin made entirely of chocolate.
Chocolate is the number one foodstuff flavour in the world, beating vanilla and banana by 3-to-1. The pleasant feeling of eating chocolate is caused by a chemical called anadamide, a neurotransmitter which also is produced naturally in the brain.
Hernando Cortez was the first European to note chocolate when he visited the court of Emperor Montezuma of Mexico in 1519.
The first chocolate house in Europe was reputedly opened in London in 1657 by a Frenchman. In the early 19th century, after the introduction of cocao powder in 1828, the English developed solid eating chocolate.
The first chocolate box was introduced by Richard Cadbury in 1868, when he decorated a candy box with a painting of his young daughter holding a kitten in her arms. Cadbury also introduced the first Valentine's Day candy box.
In 1875, after experimenting for 8 years, Daniel Peter of Switzerland added milk to chocolate to create today's familiar chocolate. His then sold his creation to his neighbour, Henri Nestle.
The 17th century French Cardinal Mazarin never traveled without his personal chocolate maker. King Louis XIV of France established in his court the position of "Royal Chocolate Maker to the King."
The chocolate chip cookie is invented by Ruth Wakefield in 1933. M&M sweets were launched in military ration packs in 1940.
In 1973, Swedish confectionery salesman Roland Ohisson was buried in a coffin made entirely of chocolate.
Chocolate is the number one foodstuff flavour in the world, beating vanilla and banana by 3-to-1. The pleasant feeling of eating chocolate is caused by a chemical called anadamide, a neurotransmitter which also is produced naturally in the brain.
Wednesday, March 26, 2008
Improve Your Communication Skills
1. Awareness of your own interaction with other people is the first step in improving your communication skills.
Learn to identify which types of situations make you uncomfortable and then modify your behavior to achieve positive results is a critical step in improving your communication skills.
You can learn to become aware of behaviors in other people that prompt you to respond in negative ways and modify your own behavior to turn the situation into a positive experience.
2. You must accept responsibility for your own behavior and do not fear apologizing for errors in judgment or insensitive actions.
Asking others for honest feedback about the way you interact with others can be very helpful. Accept the negative feedback along with the positive and make changes accordingly.
3. Your non-verbal communication is equally as important as the things that you say. Positive body language is extremely important in your interactions with other people. If your words and your actions do not match, you will have a difficult time succeeding in social situations.
4. In order to learn how to improve your communication skills, you must become a great listener. You must fight the urge to respond immediately and really listen to what the other person is trying to communicate. Offering suggestions or criticism before you are certain of the other person's intent can only lead to frustration for both parties.
5. Improving your communication skills is a process and cannot be accomplished overnight. Trying to improve or change too many things at once will be counter-productive. You will become discouraged and overwhelmed if you attempt to change your entire personality all at once. Choose one or two traits at a time and work on those over a period of time. Learn to take advantage of your personal strengths and make a positive impact on others.
6. Maximize your positive personality traits and use them in your interactions with others. Good communication and great listening skills are the most important tools you can use in improving your communication skills.
You can learn how to improve your communication skills by developing excellent listening skills, learning to resolve problems and conflicts, understanding body language, and accepting responsibility for your own negative behavior.
Determination and self-awareness will make your desire to improve your communication skills a reality.
You can change your life and now is the time to start.
Learn to identify which types of situations make you uncomfortable and then modify your behavior to achieve positive results is a critical step in improving your communication skills.
You can learn to become aware of behaviors in other people that prompt you to respond in negative ways and modify your own behavior to turn the situation into a positive experience.
2. You must accept responsibility for your own behavior and do not fear apologizing for errors in judgment or insensitive actions.
Asking others for honest feedback about the way you interact with others can be very helpful. Accept the negative feedback along with the positive and make changes accordingly.
3. Your non-verbal communication is equally as important as the things that you say. Positive body language is extremely important in your interactions with other people. If your words and your actions do not match, you will have a difficult time succeeding in social situations.
4. In order to learn how to improve your communication skills, you must become a great listener. You must fight the urge to respond immediately and really listen to what the other person is trying to communicate. Offering suggestions or criticism before you are certain of the other person's intent can only lead to frustration for both parties.
5. Improving your communication skills is a process and cannot be accomplished overnight. Trying to improve or change too many things at once will be counter-productive. You will become discouraged and overwhelmed if you attempt to change your entire personality all at once. Choose one or two traits at a time and work on those over a period of time. Learn to take advantage of your personal strengths and make a positive impact on others.
6. Maximize your positive personality traits and use them in your interactions with others. Good communication and great listening skills are the most important tools you can use in improving your communication skills.
You can learn how to improve your communication skills by developing excellent listening skills, learning to resolve problems and conflicts, understanding body language, and accepting responsibility for your own negative behavior.
Determination and self-awareness will make your desire to improve your communication skills a reality.
You can change your life and now is the time to start.
Tuesday, March 25, 2008
What is the Difference Between GSM and CDMA?
In cellular service there are two main competing network technologies: Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA). Cellular carriers including Sprint PCS, Cingular Wireless, Verizon and T-Mobile use one or the other. Understanding the difference between GSM and CDMA will allow you to choose a carrier that uses the preferable network technology for your needs.
The GSM Association is an international organization founded in 1987, dedicated to providing, developing, and overseeing the worldwide wireless standard of GSM. CDMA, a proprietary standard designed by Qualcomm in the United States, has been the dominant network standard for North America and parts of Asia. However, GSM networks continue to make inroads in the United States, as CDMA networks make progress in other parts of the world. There are camps on both sides that firmly believe either GSM or CDMA architecture is superior to the other. That said, to the non-invested consumer who simply wants bottom line information to make a choice, the following considerations may be helpful.
Coverage: The most important factor is getting service in the areas you will be using your phone. Upon viewing competitors' coverage maps you may discover that only GSM or CDMA carriers offer cellular service in your area. If so, there is no decision to be made, but most people will find that they do have a choice.
Data Transfer Speed: With the advent of cellular phones doing double and triple duty as streaming video devices, podcast receivers and email devices, speed is important to those who use the phone for more than making calls. CDMA has been traditionally faster than GSM, though both technologies continue to rapidly leapfrog along this path. Both boast "3G" standards, or 3rd generation technologies.
EVDO, also known as CDMA2000, is CDMA's answer to the need for speed with a downstream rate of about 2 megabits per second, though some reports suggest real world speeds are closer to 300-700 kilobits per second (kbps). This is comparable to basic DSL. As of fall 2005, EVDO is in the process of being deployed. It is not available everywhere and requires a phone that is CDMA2000 ready.
GSM's answer is EDGE (Enhanced Data Rates for GSM Evolution), which boasts data rates of up to 384 kbps with real world speeds reported closer to 70-140 kbps. With added technologies still in the works that include UMTS (Universal Mobile Telephone Standard) and HSDPA (High Speed Downlink Packet Access), speeds reportedly increase to about 275—380 kbps. This technology is also known as W-CDMA, but is incompatible with CDMA networks. An EDGE-ready phone is required.
In the case of EVDO, theoretical high traffic can degrade speed and performance, while the EDGE network is more susceptible to interference. Both require being within close range of a cell to get the best speeds, while performance decreases with distance.
Subscriber Identity Module (SIM) cards: In the United States only GSM phones use SIM cards. The removable SIM card allows phones to be instantly activated, interchanged, swapped out and upgraded, all without carrier intervention. The SIM itself is tied to the network, rather than the actual phone. Phones that are card-enabled can be used with any GSM carrier.
The CDMA equivalent, a R-UIM card, is only available in parts of Asia but remains on the horizon for the U.S. market. CDMA carriers in the U.S. require proprietary handsets that are linked to one carrier only and are not card-enabled. To upgrade a CDMA phone, the carrier must deactivate the old phone then activate the new one. The old phone becomes useless.
Roaming: For the most part, both networks have fairly concentrated coverage in major cities and along major highways. GSM carriers, however, have roaming contracts with other GSM carriers, allowing wider coverage of more rural areas, generally speaking, often without roaming charges to the customer. CDMA networks may not cover rural areas as well as GSM carriers, and though they may contract with GSM cells for roaming in more rural areas, the charge to the customer will generally be significantly higher.
International Roaming: If you need to make calls to other countries, a GSM carrier can offer international roaming, as GSM networks dominate the world market. If you travel to other countries you can even use your GSM cell phone abroad, providing it is a quad-band phone (850/900/1800/1900 MHz). By purchasing a SIM card with minutes and a local number in the country you are visiting, you can make calls against the card to save yourself international roaming charges from your carrier back home. CDMA phones that are not card-enabled do not have this capability, however there are several countries that use CDMA networks. Check with your CDMA provider for your specific requirements.
According CDG.org, CDMA networks support over 270 million subscribers worldwide, while GSM.org tallies up their score at over 1 billion. As CDMA phones become R-UIM enabled and roaming contracts between networks improve, integration of the standards might eventually make differences all but transparent to the consumer.
The chief GSM carriers in the United States are Cingular Wireless, recently merged with AT&T Wireless, and T-Mobile USA. Major CDMA carriers are Sprint PCS, Verizon and Virgin Mobile. There are also several smaller cellular companies on both networks.
The GSM Association is an international organization founded in 1987, dedicated to providing, developing, and overseeing the worldwide wireless standard of GSM. CDMA, a proprietary standard designed by Qualcomm in the United States, has been the dominant network standard for North America and parts of Asia. However, GSM networks continue to make inroads in the United States, as CDMA networks make progress in other parts of the world. There are camps on both sides that firmly believe either GSM or CDMA architecture is superior to the other. That said, to the non-invested consumer who simply wants bottom line information to make a choice, the following considerations may be helpful.
Coverage: The most important factor is getting service in the areas you will be using your phone. Upon viewing competitors' coverage maps you may discover that only GSM or CDMA carriers offer cellular service in your area. If so, there is no decision to be made, but most people will find that they do have a choice.
Data Transfer Speed: With the advent of cellular phones doing double and triple duty as streaming video devices, podcast receivers and email devices, speed is important to those who use the phone for more than making calls. CDMA has been traditionally faster than GSM, though both technologies continue to rapidly leapfrog along this path. Both boast "3G" standards, or 3rd generation technologies.
EVDO, also known as CDMA2000, is CDMA's answer to the need for speed with a downstream rate of about 2 megabits per second, though some reports suggest real world speeds are closer to 300-700 kilobits per second (kbps). This is comparable to basic DSL. As of fall 2005, EVDO is in the process of being deployed. It is not available everywhere and requires a phone that is CDMA2000 ready.
GSM's answer is EDGE (Enhanced Data Rates for GSM Evolution), which boasts data rates of up to 384 kbps with real world speeds reported closer to 70-140 kbps. With added technologies still in the works that include UMTS (Universal Mobile Telephone Standard) and HSDPA (High Speed Downlink Packet Access), speeds reportedly increase to about 275—380 kbps. This technology is also known as W-CDMA, but is incompatible with CDMA networks. An EDGE-ready phone is required.
In the case of EVDO, theoretical high traffic can degrade speed and performance, while the EDGE network is more susceptible to interference. Both require being within close range of a cell to get the best speeds, while performance decreases with distance.
Subscriber Identity Module (SIM) cards: In the United States only GSM phones use SIM cards. The removable SIM card allows phones to be instantly activated, interchanged, swapped out and upgraded, all without carrier intervention. The SIM itself is tied to the network, rather than the actual phone. Phones that are card-enabled can be used with any GSM carrier.
The CDMA equivalent, a R-UIM card, is only available in parts of Asia but remains on the horizon for the U.S. market. CDMA carriers in the U.S. require proprietary handsets that are linked to one carrier only and are not card-enabled. To upgrade a CDMA phone, the carrier must deactivate the old phone then activate the new one. The old phone becomes useless.
Roaming: For the most part, both networks have fairly concentrated coverage in major cities and along major highways. GSM carriers, however, have roaming contracts with other GSM carriers, allowing wider coverage of more rural areas, generally speaking, often without roaming charges to the customer. CDMA networks may not cover rural areas as well as GSM carriers, and though they may contract with GSM cells for roaming in more rural areas, the charge to the customer will generally be significantly higher.
International Roaming: If you need to make calls to other countries, a GSM carrier can offer international roaming, as GSM networks dominate the world market. If you travel to other countries you can even use your GSM cell phone abroad, providing it is a quad-band phone (850/900/1800/1900 MHz). By purchasing a SIM card with minutes and a local number in the country you are visiting, you can make calls against the card to save yourself international roaming charges from your carrier back home. CDMA phones that are not card-enabled do not have this capability, however there are several countries that use CDMA networks. Check with your CDMA provider for your specific requirements.
According CDG.org, CDMA networks support over 270 million subscribers worldwide, while GSM.org tallies up their score at over 1 billion. As CDMA phones become R-UIM enabled and roaming contracts between networks improve, integration of the standards might eventually make differences all but transparent to the consumer.
The chief GSM carriers in the United States are Cingular Wireless, recently merged with AT&T Wireless, and T-Mobile USA. Major CDMA carriers are Sprint PCS, Verizon and Virgin Mobile. There are also several smaller cellular companies on both networks.
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Beware! Trojan virus on prowl
An extract article from Economic Times
BE CAREFUL when you find any Windows update suggestion on your system. This may be the attack of the Trojan virus which would result in the crashing of your system. Department of information technology (DIT) has observed that malicious files are being propagated through fraudulent websites pretending to be providing updates to Microsoft Windows. Your computer may come into attack when you click on the links provided in some spam email which may look identical to some of your contacts. The malicious link directs users to a webpage asking them to click upon ‘urgent install’ button. As soon as one presses the button the system comes into attack. The attack may lead into siphoning of information apart from letting your computer crash. The interesting thing is that the word ‘install’ in the link has been mis-spelled as ‘intall’ making it easier to identify.
“As the virus is affecting Windows users and is targetted towards the Microsoft corporation we have advised the users to adhere to the official guidelines of Microsoft to avoid any difficult situation,” an official of the DIT said. An executable file named WindowsUpdate Agent30-x86-x64.exe has been identified as the route to the virus. This executable file is malware named as Trojan-Dropper: Similar attacks have been tracked via Orkut, facebook and other sites.
Sunday, March 9, 2008
The Difference between Focusing on Problems and Focusing on Solutions
Case 1: When NASA began the launch of astronauts into space, they found out that the pens wouldn't work at zero gravity (ink won't flow down to the writing surface). To solve this problem, it took them one decade and $12 million. They developed a pen that worked at zero gravity, upside down, underwater, in practically any surface including crystal and in a temperature range from below freezing to over 300 degrees C.
And what did the Russians do...?? They used a pencil.
Case 2: One of the most memorable case studies on Japanese management was the case of the empty soap box, which happened in one of Japan 's biggest cosmetics companies. The company received a complaint that a consumer had bought a soap box that was empty. Immediately the authorities isolated the problem to the assembly line, which transported all the packaged boxes of soap to the delivery department. For some reason, one soap box went through the assembly line empty.
Management asked its engineers to solve the problem. Post-haste, the engineers worked hard to devise an X-ray machine with high-resolution monitors manned by two people to watch all the soap boxes that passed through the line to make sure they were not empty. No doubt, they worked hard and they worked fast but they spent a whoopee amount to do so.
But when a rank-and-file employee in a small company was posed with the same problem, he did not get into complications of X-rays, etc., but instead came out with another solution. He bought a strong industrial electric fan and pointed it at the assembly line. He switched the fan on, and as each soap box passed the fan, it simply blew the empty boxes out of the line.
And what did the Russians do...?? They used a pencil.
Case 2: One of the most memorable case studies on Japanese management was the case of the empty soap box, which happened in one of Japan 's biggest cosmetics companies. The company received a complaint that a consumer had bought a soap box that was empty. Immediately the authorities isolated the problem to the assembly line, which transported all the packaged boxes of soap to the delivery department. For some reason, one soap box went through the assembly line empty.
Management asked its engineers to solve the problem. Post-haste, the engineers worked hard to devise an X-ray machine with high-resolution monitors manned by two people to watch all the soap boxes that passed through the line to make sure they were not empty. No doubt, they worked hard and they worked fast but they spent a whoopee amount to do so.
But when a rank-and-file employee in a small company was posed with the same problem, he did not get into complications of X-rays, etc., but instead came out with another solution. He bought a strong industrial electric fan and pointed it at the assembly line. He switched the fan on, and as each soap box passed the fan, it simply blew the empty boxes out of the line.
Wednesday, March 5, 2008
Cracked pot
A water bearer in China had two large pots, each hung on the ends of a pole which he carried across his neck. One of the pots had a crack in it, while the other pot was perfect and always delivered a full portion of water. At the end of the long walk from the stream to the House, the cracked pot arrived only half full. For a full two years this went on daily, with the bearer delivering only one and a half pots full of water to his house. Of course, the perfect pot was proud of its accomplishments, perfect for which it was made. But the poor cracked pot was ashamed of it's own imperfection. And miserable that it was able to accomplish only half of what it had been made to do.
After two years of what it perceived to be a bitter failure, it spoke to the water bearer one day by the stream. "I am ashamed of myself, and I want to apologize to you. I have been able to
deliver only half my load because this crack in my side causes water to leak out all the way back to your house. Because of my flaws, you have to do all of this work, and you don't get full
value from your efforts," the pot said.
The bearer said to the pot, "Did you notice that there were flowers only on your side of the path, but not on the other pot's side? That's because I have always known about your flaw. So I
planted flower seeds on your side of the path, and every day while we walk back, you've watered them. For two years I have been able to pick these beautiful flowers to decorate the table.
Without you being just the way you are, there would not be this beauty to grace the house?
Moral: Each of us has our own unique flaws. We're all cracked pots. But it's the cracks and flaws we each have that make our lives together so very interesting and rewarding. You've just got to take each person for what they are, and look for the good in them. Blessed are the flexible, for they shall not be bent out of shape.
Remember to appreciate all the different people in your life.
After two years of what it perceived to be a bitter failure, it spoke to the water bearer one day by the stream. "I am ashamed of myself, and I want to apologize to you. I have been able to
deliver only half my load because this crack in my side causes water to leak out all the way back to your house. Because of my flaws, you have to do all of this work, and you don't get full
value from your efforts," the pot said.
The bearer said to the pot, "Did you notice that there were flowers only on your side of the path, but not on the other pot's side? That's because I have always known about your flaw. So I
planted flower seeds on your side of the path, and every day while we walk back, you've watered them. For two years I have been able to pick these beautiful flowers to decorate the table.
Without you being just the way you are, there would not be this beauty to grace the house?
Moral: Each of us has our own unique flaws. We're all cracked pots. But it's the cracks and flaws we each have that make our lives together so very interesting and rewarding. You've just got to take each person for what they are, and look for the good in them. Blessed are the flexible, for they shall not be bent out of shape.
Remember to appreciate all the different people in your life.
Monday, February 25, 2008
How visiting cards originated?
There are many theories about the origin of visiting cards and no specific dates are given.However it is believed that the Chinese used them for many centuries.In ancient Egypt,It had been customary,when visiting a temple, to present a slip of earth en ware inscribed with the name & titles of the worshipper.It is believed that this later developed into the present form.
According to another theory, visiting cards which were probably in Europe around the sixteenth Century, originated following a custom that existed among German Students.It is said that students who were keen on playing ceremonial calls of farewell to their professors when about to leave university started leaving their names on small slips of paper when they didn't succeed in finding the professors at home.Later on women are believed to have picked up this custom , substituting cards for the paperHow visiting cards originated?
According to another theory, visiting cards which were probably in Europe around the sixteenth Century, originated following a custom that existed among German Students.It is said that students who were keen on playing ceremonial calls of farewell to their professors when about to leave university started leaving their names on small slips of paper when they didn't succeed in finding the professors at home.Later on women are believed to have picked up this custom , substituting cards for the paperHow visiting cards originated?
How visiting cards originated?
There are many theories about the origin of visiting cards and no specific dates are given.However it is believed that the Chinese used them for many centuries.In ancient Egypt,It had been customary,when visiting a temple, to present a slip of earth en ware inscribed with the name & titles of the worshipper.It is believed that this later developed into the present form.
According to another theory, visiting cards which were probably in Europe around the sixteenth Century, originated following a custom that existed among German Students.It is said that students who were keen on playing ceremonial calls of farewell to their professors when about to leave university started leaving their names on small slips of paper when they didn't succeed in finding the professors at home.Later on women are believed to have picked up this custom , substituting cards for the paperHow visiting cards originated?
According to another theory, visiting cards which were probably in Europe around the sixteenth Century, originated following a custom that existed among German Students.It is said that students who were keen on playing ceremonial calls of farewell to their professors when about to leave university started leaving their names on small slips of paper when they didn't succeed in finding the professors at home.Later on women are believed to have picked up this custom , substituting cards for the paperHow visiting cards originated?
How visiting cards originated?
There are many theories about the origin of visiting cards and no specific dates are given.However it is believed that the Chinese used them for many centuries.In ancient Egypt,It had been customary,when visiting a temple, to present a slip of earth en ware inscribed with the name & titles of the worshipper.It is believed that this later developed into the present form.
According to another theory, visiting cards which were probably in Europe around the sixteenth Century, originated following a custom that existed among German Students.It is said that students who were keen on playing ceremonial calls of farewell to their professors when about to leave university started leaving their names on small slips of paper when they didn't succeed in finding the professors at home.Later on women are believed to have picked up this custom , substituting cards for the paperHow visiting cards originated?
According to another theory, visiting cards which were probably in Europe around the sixteenth Century, originated following a custom that existed among German Students.It is said that students who were keen on playing ceremonial calls of farewell to their professors when about to leave university started leaving their names on small slips of paper when they didn't succeed in finding the professors at home.Later on women are believed to have picked up this custom , substituting cards for the paperHow visiting cards originated?
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