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The August 12, 1981 IBM launched the first PC of the story had a 20 MB hard drive, 16 Kb of RAM and a 11.5 inch screen in black and white and no graphics support (letters and numbers only.) Your keyboard offering 83 keys and some models also integrated 1.5-inch floppy drive. The operating system was IBM PC DOS (precursor of the famous MS-DOS) and offered connections to printers and other devices.
By selling personal computer (PC) the computer became a handy utility that later we would rely on it. In early 80's and there were personal computers, but it was IBM who set a standard hardware and software and operating system from Microsoft.

PC A COMPARISON OF CURRENT AND THE OLDEST

First PC has De20 MB hard drive, a 16 KB RAM, a 11.5-inch screen and a IBM PC operating system PC DOS
current has a hard drive between 500 and 640 GB, RAM of 1 or 2 GB, a screen between 15 and 19 inches and a Windows XP operating system on today but you can install Linux or another as the different versions of Windows

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What is the difference between peripheral input and output?

Input Devices: Devices that allow introduce external data into the computer for further processing by the CPU. This data can come from various sources, the main human. The most common input devices are: keyboard, microphone, scanner, mouse or mouse ...

Output peripherals: S on devices that display or project information to the outside computer. Most are to inform, alert, report, plan or give the user some information, in the same way are responsible for converting the electrical impulses in human-readable information. However, not all of these peripherals is user information . getting the information that is processed by the CPU and reproduce. Some examples are: Monitor, printer, speakers, headphones, fax ...

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What is hardware? What is software?

THE HARDWARE: It's the computer's physical components, ie everything that can see and touch. The hardware can be classified into two types:
- The found inside the tower or CPU , and therefore can not see with the naked eye. An example might be the sound card or RAM

- The found around the tower or CPU , and therefore, if we see with the naked eye, and we call peripheral. An example might be a mouse or printer.

SOFTWARE: Are the instructions the computer needs to run, do not physically exist, or what is the same, you can not see or touch. We also have two types:
- Operating Systems: Their mission is the computer manage its resources efficiently, as well to allow communication with the user.

- Applications: These are computer programs that attempt to solve specific user needs, such as: writing, drawing, music ...