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The Personal System/2 or PS/2 is IBM's second generation [1] [2] of personal computers. Released in 1987, it officially replaced the IBM PC , XT , AT , and PC Convertible in IBM's lineup. Many of the PS/2's innovations, such as the 16550 UART (serial port), 1440 KB 3.5-inch floppy disk format, 72-pin SIMMs , PS/2 port , and VGA video standard ...
PC/104 is an embedded computer standard which defines both a form factor and computer bus. PC/104 is intended for embedded computing environments. Single-board computers built to this form factor are often sold by COTS vendors, which benefits users who want a customized rugged system, without months of design and paper work.
The PS/2 Model N33 SX (also known as PS/2 note N33 SX) was the first notebook-sized computer from IBM which was announced in 1991. [3] This model was based on the AT-bus and had between 2 or 6MB RAM. It has a 9.5" 16-greyscale VGA LCD (640x480), a 1.44MB floppy, expansion ports and a 40MB or 80MB HDD, and weighs 5.5 lb (2.5 kg). [4]
2 Intel 8088: 4.77 48 KB 64 KB 160 KB none Single-sided, double-density floppy disk drive [1]: 1 [4]: 47 [2]: 167, 1050 [3] Personal Computer: 5150-013 Unknown Unknown ISA, 8-bit 5 2 Intel 8088: 4.77 Unknown Unknown Unknown Unknown [5]: 228 Personal Computer: 5150-014 Unknown March 1983: ISA, 8-bit 5 2 Intel 8088: 4.77 16 KB
Fourth generation computers(1971–present): It uses Microprocessors, as millions of ICs were built onto a single silicon-based chip. Since then form factor of computers reduced, task processing & graphic rendering improved and it became more battery-powered with the advent of personal mobile devices such as laptops, tablets, smartphones etc.
The first documented computer architecture was in the correspondence between Charles Babbage and Ada Lovelace, describing the analytical engine.While building the computer Z1 in 1936, Konrad Zuse described in two patent applications for his future projects that machine instructions could be stored in the same storage used for data, i.e., the stored-program concept.
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A more interactive form of computer use developed commercially by the middle 1960s. In a time-sharing system, multiple teleprinter and display terminals let many people share the use of one mainframe computer processor, with the operating system assigning time slices to each user's jobs. This was common in business applications and in science ...