Model F keyboard

（重定向自AT Keyboard）

Model F capacitive pads from an opened assembly

Corrosion occurring on a Model F 122 terminal keyboard along with dust

A comparison between a Model F spring (left) and a Model M spring (right); the Model M uses a spring with fewer windings and smaller plate for the plastic membrane underneath

The Model F was a series of computer keyboards produced from 1981–1994 by IBM and later Lexmark. Its mechanical-key design consisted of a buckling spring over a capacitive PCB, similarly to the later Model M that used a membrane in place of the PCB.

The Model F first appeared with the IBM System/23 Datamaster all-in-one computer. It is best known as part of the IBM Personal Computer in 1981 with some keycap label differences, and its subsequent release with the IBM 5170, where it was reconfigured with the AT protocol and some layout revisions.

单词	AT Keyboard
释义	AT Keyboard 原声例句艺术巨作揭秘 Most of his music players stand posed and silent at keyboards but she is moving. 在他画中，乐手大多在键盘前安静不动。英语百科 Model F keyboard （重定向自AT Keyboard） The Model F was a series of computer keyboards produced from 1981–1994 by IBM and later Lexmark. Its mechanical-key design consisted of a buckling spring over a capacitive PCB, similarly to the later Model M that used a membrane in place of the PCB. The Model F first appeared with the IBM System/23 Datamaster all-in-one computer. It is best known as part of the IBM Personal Computer in 1981 with some keycap label differences, and its subsequent release with the IBM 5170, where it was reconfigured with the AT protocol and some layout revisions.
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