'Online Reservation for Catering Services Essay\r'

'The Apple II became an instant victor when released in 1977 with its printed circuit motherboard, switching power supply, keyboard, grounds assembly, manual, game paddles, A/C powercord, and cassette tape with the computing device game â€Å"Breakout.” When hooked up to a trick television set, the Apple II produced brilliant tinge graphics.\r\nThe Kenbak-1, the first personal computer, advertised for $750 in scientific Ameri rump. Designed by John V. Blankenbaker using sample medium-scale and small-scale integrated circuits, the Kenbak-1 relied on switches for input and lights for take from its 256-byte memory. In 1973, after selling only 40 machines, Kenbak Corp. closed its doors.\r\nThe Commodore PET (Personal Electronic Transactor) †the first of several(prenominal) personal computers released in 1977 †came fully assembled and was straightforward to operate, with every 4 or 8 kilobytes of memory, two entire cassette drives, and a membrane â€Å"chicletâ⠂¬Â keyboard.\r\nThe abacus was an early aid for numeric computations. Its only value is that it aids the memory of the gracious performing the calculation. A skilled abacus operator can work on addition and subtraction problems at the speed of a person equipped with a hand calculator (multiplication and division are slower). The abacus is much wrongly attributed to China. In fact, the oldest surviving abacus was substance abuse in 300 B.C. by the Babylonians. The abacus is still in use today, principally in the far east. A moderne abacus consists of rings that slide over rods, but the elderly one pictured below dates from the time when pebbles were used for counting (the enounce â€Å"calculus” comes from the Latin word for pebble).\r\n'