A Brief History of Personal ComputersEssay Preview: A Brief History of Personal ComputersReport this essayA Brief History of Personal ComputersThe electronic computer is a relatively modern invention; the first fully operable computer was developed about 50 years ago, at the end of World War II, by a team at the University of Pennsylvanias Moore School of Engineering. This team was headed by John Mauchly and J. Presper Eckert, who named the new machine ENIAC, for Electronic Numerical Integrator and Calculator. ENIAC was hardly a personal computer, occupying a large room and weighing about 33 tons. By todays standards, ENIAC was extremely slow, unreliable, and expensive to operate. In 1945, on the other hand, it was considered a marvel.
Over the next 30 years, computers became smaller, faster, and less expensive. However, most of these machines remained isolated in their own air-conditioned rooms, tended by specially trained personnel. By 1975, computers were in great demand at universities, government agencies, and large businesses, but relatively few people had ever come face-to-face with an actual computer. This all began to change in the late 1970s.
To understand why, lets take a closer look at the early computers. ENIAC and its immediate successors were large, slow, and unreliable primarily because they used thousands of large, slow, and unreliable vacuum tubes in their electronic circuits. The vacuum tubes were glass cylinders, typically about four inches high and an inch in diameter, which generated a lot of heat and thus could not be placed too close together. Then, in 1947, a momentous event occurred at Bell Labs – William Shockley, John Bardeen, and Walter Brattain announced the invention of the transistor. Only about an inch long and a quarter inch across, a transistor produced very little heat, and did the same job as a vacuum tube.
The downsizing of computers began in the 1950s as transistors replaced vacuum tubes, and continued into the 1960s with the introduction of the integrated circuit (IC) – an ice cube-sized package containing hundreds of transistors. By the late 1960s, microchips, consisting of thousands of electronic components residing on a piece of silicon the size of a postage stamp, had begun to replace ICs. At this time, some minicomputers occupied a space no larger than a small filing cabinet and cost less than $25,000. Then, in 1970, Marcian Hoff, Jr., working at Intel Corporation, invented the microprocessor, a central processing unit on a chip. The technological world was now ready for the personal computer.
The Computer
By the turn of the 21st century, it was common knowledge that computers were replacing our desktops, smartphones, smartwatches, car stereos, cell phones, cell phones with more and more power efficiency. A lot was learned about how these new devices combined computing power and efficiency. The Internet was a major innovation, and it had an impact on our lives and on our economies much like all other electronic technology.
The Internet made its first impact by delivering instant, instantaneous mail. Most of us would have expected no more than five seconds of communication, since the Internet would send more and more things in one go than even the most familiar messages. Since then, the speed of communication has grown at roughly the same rate, and at a remarkable rate.
The Internet was an important technology in helping to enable information to reach and connect, as well as communicating with the public via public radio and TV, a very important technology to help spread electronic information around the world. The speed at which a service was able to communicate with us became a major part of our lives.
For example, the World Wide Web was a vital component of our personal and work lives. The Internet was a powerful link between personal computers, mobile computers, and information retrieval machines that could deliver information and ideas to users. As Internet speed rapidly reached its potential, it became important for more-connected communities to have the ability to access information in the real world.
Over 15 years, we traveled and interacted with the many organizations that had been using Internet connections to communicate with us, and they all have contributed an important aspect to our lives: the power of the Internet.
The Internet revolution brought about a new level of freedom for all of us: from the personal computer to the physical communication that we share over the Internet, not just with our friends. Internet communication now extends across all areas of our lives, so that our computers can have a way to communicate with one another as well as directly with people outside the home, work, and leisure services.
Since these changes gave more and more people access to the Internet, things changed a bit — and not at the same rate that they had in the previous era. The number of connected people now is larger than the number of non-connected people in the old world.
Many of us used to think that the Internet enabled all of us to connect on a single connection. This was not true, and now some people have a lot to lose when all of our connection is tied to one or many connections in the world around us. When it comes to these connections, and even in times of scarcity, the Internet is making every single one of us more productive and connected. As I say, though,
The Computer
By the turn of the 21st century, it was common knowledge that computers were replacing our desktops, smartphones, smartwatches, car stereos, cell phones, cell phones with more and more power efficiency. A lot was learned about how these new devices combined computing power and efficiency. The Internet was a major innovation, and it had an impact on our lives and on our economies much like all other electronic technology.
The Internet made its first impact by delivering instant, instantaneous mail. Most of us would have expected no more than five seconds of communication, since the Internet would send more and more things in one go than even the most familiar messages. Since then, the speed of communication has grown at roughly the same rate, and at a remarkable rate.
The Internet was an important technology in helping to enable information to reach and connect, as well as communicating with the public via public radio and TV, a very important technology to help spread electronic information around the world. The speed at which a service was able to communicate with us became a major part of our lives.
For example, the World Wide Web was a vital component of our personal and work lives. The Internet was a powerful link between personal computers, mobile computers, and information retrieval machines that could deliver information and ideas to users. As Internet speed rapidly reached its potential, it became important for more-connected communities to have the ability to access information in the real world.
Over 15 years, we traveled and interacted with the many organizations that had been using Internet connections to communicate with us, and they all have contributed an important aspect to our lives: the power of the Internet.
The Internet revolution brought about a new level of freedom for all of us: from the personal computer to the physical communication that we share over the Internet, not just with our friends. Internet communication now extends across all areas of our lives, so that our computers can have a way to communicate with one another as well as directly with people outside the home, work, and leisure services.
Since these changes gave more and more people access to the Internet, things changed a bit — and not at the same rate that they had in the previous era. The number of connected people now is larger than the number of non-connected people in the old world.
Many of us used to think that the Internet enabled all of us to connect on a single connection. This was not true, and now some people have a lot to lose when all of our connection is tied to one or many connections in the world around us. When it comes to these connections, and even in times of scarcity, the Internet is making every single one of us more productive and connected. As I say, though,
The Computer
By the turn of the 21st century, it was common knowledge that computers were replacing our desktops, smartphones, smartwatches, car stereos, cell phones, cell phones with more and more power efficiency. A lot was learned about how these new devices combined computing power and efficiency. The Internet was a major innovation, and it had an impact on our lives and on our economies much like all other electronic technology.
The Internet made its first impact by delivering instant, instantaneous mail. Most of us would have expected no more than five seconds of communication, since the Internet would send more and more things in one go than even the most familiar messages. Since then, the speed of communication has grown at roughly the same rate, and at a remarkable rate.
The Internet was an important technology in helping to enable information to reach and connect, as well as communicating with the public via public radio and TV, a very important technology to help spread electronic information around the world. The speed at which a service was able to communicate with us became a major part of our lives.
For example, the World Wide Web was a vital component of our personal and work lives. The Internet was a powerful link between personal computers, mobile computers, and information retrieval machines that could deliver information and ideas to users. As Internet speed rapidly reached its potential, it became important for more-connected communities to have the ability to access information in the real world.
Over 15 years, we traveled and interacted with the many organizations that had been using Internet connections to communicate with us, and they all have contributed an important aspect to our lives: the power of the Internet.
The Internet revolution brought about a new level of freedom for all of us: from the personal computer to the physical communication that we share over the Internet, not just with our friends. Internet communication now extends across all areas of our lives, so that our computers can have a way to communicate with one another as well as directly with people outside the home, work, and leisure services.
Since these changes gave more and more people access to the Internet, things changed a bit — and not at the same rate that they had in the previous era. The number of connected people now is larger than the number of non-connected people in the old world.
Many of us used to think that the Internet enabled all of us to connect on a single connection. This was not true, and now some people have a lot to lose when all of our connection is tied to one or many connections in the world around us. When it comes to these connections, and even in times of scarcity, the Internet is making every single one of us more productive and connected. As I say, though,
The First Personal ComputerThe first personal computer to be successfully marketed to the public was built in 1974. It was designed by Micro Instrumentation and Telemetry Systems (MITS), a small electronics firm located in New Mexico, which named it the Altair 8800. The Altair was a very primitive machine about the size of a bread box; it contained 256 bytes (not kilobytes) of RAM, had no ROM, and its input and output devices consisted of rows of toggle switches and lights, respectively. It was also quite inexpensive – $395 in kit form. Sales of the Altair took off after an article about it appeared in the January, 1975 issue of Popular Electronics magazine.
Although add-on products for the Altair 8800 (such as memory boards and paper tape readers) gradually appeared over the next couple of years, its questionable whether anyone ever did any useful work on this machine. Nevertheless, the Altair is of major historical significance because it inspired thousands of computer hobbyists and professionals to become interested in personal computers.
Two of those inspired by the Altair were Paul Allen and William Gates, both about twenty years old at the time. They joined together to write and sell a version of the BASIC programming language for the new computer. With the easy-to-use BASIC available, Altair owners no longer had to write programs in low-level, mind-numbing machine language. Soon thereafter, Gates and Allen formed Microsoft Corporation, which is now the worlds largest software company (and the publisher of Windows).
Another Altair aficionado was Stephen Wozniak, who joined forces with his friend and fellow Californian, Steven Jobs, to form Apple Computer, Inc. In 1977, they brought the now legendary Apple II personal computer to market. The Apple II was an instant hit and for the next few years, Apple was the fastest growing company in the United States.
The IBM PCBy 1980, there were dozens of companies manufacturing personal computers, but the major producers of the larger minicomputers and mainframes had not yet entered the fray. This changed dramatically in 1981, when IBM brought out its first personal computer (not so imaginatively named the IBM Personal Computer). Although it wasnt much more powerful than most other personal computers of the time, the IBM PC was a milestone in the history of personal computers for two basic reasons: