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Computers introduced between 1959 and 1964, often regarded as second-generation computers, were based on discrete transistors and printed circuits – resulting in smaller, more powerful and more reliable computers. 1959 UK
A second-generation computer, through the late 1950s and 1960s featured circuit boards filled with individual transistors and magnetic-core memory. These machines remained the mainstream design into the late 1960s, when integrated circuits started appearing and led to the third-generation computer.
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.
This is a list of transistorized computers, which were digital computers that used discrete transistors as their primary logic elements. Discrete transistors were a feature of logic design for computers from about 1960, when reliable transistors became economically available, until monolithic integrated circuits displaced them in the 1970s.
The Computer History in time and space, Graphing Project, an attempt to build a graphical image of computer history, in particular operating systems. The Computer Revolution/Timeline at Wikibooks "File:Timeline.pdf - Engineering and Technology History Wiki" (PDF). ethw.org. 2012. Archived (PDF) from the original on 2017-10-31
Key home computers in the early part of the decade predominantly use processors developed in the 1970s. Versions of the 6502, first released in 1975, powered the Commodore 64, Apple II, BBC Micro, and Atari 8-bit computers. The 8-bit Zilog Z80 (1976) is at the core of the ZX Spectrum, MSX systems and many others.
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The second generation 1974 Q1/Lite ran on an Intel 8080, integrated two floppy drives into the computer's enclosure, and included an updated multi-line flat-panel plasma display. [30] Around this time, a Q1 MicroLite was also introduced, incorporating the Lite's plasma display and printer but only one of its two floppy drives into an identical ...