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Similarly, indirect addressing became more common in the second generation, either in conjunction with index registers or instead of them. While first-generation computers typically had a small number of index registers or none, several lines of second-generation computers had large numbers of index registers, e.g., Atlas, Bendix G-20, IBM 7070.
The second hardware revision, the Lisa 2, was released in January 1984 and was priced between $3,495 and $5,495. [4]: 79 [26] It was much less expensive than the original model, and dropped the Twiggy floppy drives in favor of a single 400K Sony microfloppy. [27] The Lisa 2 has as little as 512 KB of RAM.
Apple II ("apple two") is a series of microcomputers manufactured by Apple Computer, Inc. from 1977 to 1993. The original Apple II model, which gave the series its name, was designed by Steve Wozniak and was first sold on June 10, 1977. [2]
An Apple II computer with an external modem. The Apple II (stylized as apple ][) is a personal computer released by Apple Inc. in June 1977. It was one of the first successful mass-produced microcomputer products and is widely regarded as one of the most important personal computers of all time due to its role in popularizing home computing and influencing later software development.
ILLIAC IV parallel computer's Control Unit (CU). The ILLIAC IV was the first massively parallel computer. [1] The system was originally designed to have 256 64-bit floating point units (FPUs) and four central processing units (CPUs) able to process 1 billion operations per second. [2]
It is capable of around 60,000 instructions per second (0.06 MIPS), running at a maximum clock speed of 740 kHz. 1971: 8-inch floppy disk introduced. [34] 1972: US Texas Instruments releases its first single-chip electronic calculator, the TI-2500 Datamath. [35] 1972: US Atari founded by Nolan Bushnell and Ted Dabney. 1972: US
The Associated Press sued three Trump administration officials Friday over access to presidential events, citing freedom of speech in asking a federal judge to stop the 10-day blocking of its ...
IBM 1620. A transistor computer, now often called a second-generation computer, [1] is a computer which uses discrete transistors instead of vacuum tubes.The first generation of electronic computers used vacuum tubes, which generated large amounts of heat, were bulky and unreliable.