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Power supply unit (computer) A power supply unit ( PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power supplies. Some power supplies have a manual switch for selecting input voltage, while others automatically adapt to the main voltage.
VisiCalc ("visible calculator") is the first spreadsheet computer program for personal computers, originally released for Apple II by VisiCorp on October 17, 1979. It is considered the killer application for the Apple II, turning the microcomputer from a hobby for computer enthusiasts into a serious business tool, and then prompting IBM to introduce the IBM PC two years later.
The TRS-80 Micro Computer System ( TRS-80, later renamed the Model I to distinguish it from successors) is a desktop microcomputer launched in 1977 and sold by Tandy Corporation through their Radio Shack stores. The name is an abbreviation of Tandy Radio Shack, Z80 [microprocessor]. [4] It is one of the earliest mass-produced and mass-marketed ...
Apple IIc. The Macintosh, later rebranded as the Macintosh 128K, is the original Macintosh personal computer, from Apple. It is the first successful mass-market all-in-one desktop personal computer with a graphical user interface, built-in screen, and mouse. It was pivotal in establishing desktop publishing as a general office function.
The Information Age (also known as the Third Industrial Revolution, Computer Age, Digital Age, Silicon Age, New Media Age, Internet Age, or the Digital Revolution [1]) is a historical period that began in the mid-20th century to the early 21st century. It is characterized by a rapid shift from traditional industries, as established during the ...
Hewlett-Packard. / 37.4136; -122.1451. The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( / ˈhjuːlɪt ˈpækərd / HYEW-lit PAK-ərd) or HP, was an American multinational information technology company headquartered in Palo Alto, California. HP developed and provided a wide variety of hardware components, as well as software ...
The computer's design was based largely on the Xerox NoteTaker, a prototype developed at Xerox PARC in 1976 by Alan Kay. It was designed to be portable, with a rugged ABS plastic case and a handle. The Osborne 1 is about the size and weight of a sewing machine and was advertised as the only computer that would fit underneath an airline seat.
The Osborne Computer Corporation ( OCC) was an American computer company and pioneering maker of portable computers. It was located in the Silicon Valley of the southern San Francisco Bay Area in California. [1] Adam Osborne, the founder of the company, developed, with design work from Lee Felsenstein, the world's first mass-produced portable ...