40%
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40% is a term to describe very small, usually community-made keyboards. 40% keyboards typically have 45-50 keys.
The most notable characteristic of such keyboards is that they lack both the number row and the function row which allows for more desk space at the cost of requiring the use of often 2 or more Fn keys or equivalents to enter some characters. 40% keyboard designs exhibit more variation and creativity than 60% designs, as the latter tend to be based heavily on the basic ANSI and ISO full-size keyboard.
40% keyboards frequently are with split ergonomic or ortholinear layouts. 40% keyboards are often highly programmable with software such as QMK, an open source keyboard firmware.
Examples
- Deskthority — Tiny Hacking Keyboard (THKB)
- Deskthority — Planck (OLKB)
- Geekhack — SmallFry KB
- Deskthority — HyperMicro (not referred to here as "40%")
