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Abacus
The Abacus was first made to use as a counting device. Greeks created this device. -
Holes in cards
A punched card, punch card, IBM card, or Hollerith card is a piece of stiff paper that contains digital information represented by the presence or absence of holes in predefined positions. -
The analytical machine
The Analytical Engine was to be a general-purpose, fully program-controlled, automatic mechanical digital computer. It would be able to perform any calculation set before it. There is no evidence that anyone before Babbage had ever conceived of such a device, let alone attempted to build one. The machine was designed to consist of four components: the mill, the store, the reader, and the printer. -
Von Neumann architecture
A computer architecture proposed by a mathematician. this describes a design architecture for an electronic digital computer with subdivisions of a processing unit consisting of an arithmetic and processor registers, a control unit containing an instruction register and program counter, a memory to store both data and instructions, external mass storage, and input and output mechanisms. -
ENIAC
1946 ENIAC was designed to calculate artillery firing tables for the United States Army's Ballistic Research Laboratory.[4][5] When ENIAC was announced in 1946 it was heralded in the press as a "Giant Brain". It had a speed of one thousand times that of electro-mechanical machines. -
Univac
The machine was 25 feet by 50 feet in length, contained 5,600 tubes, 18,000 crystal diodes, and 300 relays. It utilized serial circuitry, 2.25 MHz bit rate, and had an internal storage capacity 1,000 words or 12,000 characters. -
high-level programming language
FORTRAN or formula translation was the first high level programming language invented by John Backus for IBM in 1954, and released commercially in 1957. Fortran is still used today for programming scientific and mathematical applications. -
UNIX operating system
Unix (officially trademarked as UNIX, sometimes also written as Unix in small caps) is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, Michael Lesk and Joe Ossanna.[1] The Unix operating system was first developed in assembly language, but by 1973 had been almost entirely recoded in C, greatly facilitating its further development and porting to ot -
Altair
The Altair 8800 from Micro Instrumentation Telemetry Systems (MITS) of Albuquerque, NM, is considered by many to be the first "personal computer" - a computer that is easily affordable and obtainable. -
PC
A personal computer is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end-user with no intervening computer operator. -
Apple
Apple designs and creates iPod and iTunes, Mac laptop and desktop computers, the OS X operating system, and the iPhone and iPad. -
CRAY-1
The Cray-1 was a supercomputer designed, manufactured, and marketed by Cray Research. The first Cray-1 system was installed at Los Alamos National Laboratory in 1976, and it went on to become one of the best known and most successful supercomputers in history. -
first electronic spreadsheet
VisiCalc was the first computer spreadsheet program. It was released to the public in 1979, running on an Apple II computer. While most early microprocessor computers had been quickly supported by BASIC and a few games, VisiCalc introduced a new level in application software. It was considered a fourth generation software program. -
Windows
Microsoft Windows is a series of graphical interface operating systems developed, marketed, and sold by Microsoft. Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces. -
Macintosh
Steve jobs introduced the first mac computer on January 24 1984 this was the first commercialized personal computer.
