Phonetic keyboard layout Phonetic keyboard layout A phonetic keyboard layout is a setup in which the letters of a language correspond to the keys in the keyboard layout for another language and assumes a one-to-one correspondence between letters in the languages that is based on their sound. Russian has two popular keyboard layouts: The Cyrillic letters are on the same keys as similarly-sounding Roman letters: A-А, Б-B, В-V, Г-G, Д-D, Ф-F, K-K, O-O and so on. There are Russian phonetic layouts based on the QWERTY layout and others based on other localized layouts. The Russian phonetic layout is especially suited for foreigners studying
Computer keyboard (or computer) "debounces" the keystrokes, by aggregating them across time to produce one "confirmed" keystroke. Some low-quality keyboards also suffer problems with "rollover" (that is, when multiple keys pressed at the same time, or when keys are pressed so fast that multiple keys are down within the same milliseconds). Early "solid-state" keyswitch keyboards did not have this problem because the keyswitches are electrically isolated from each other, and early "direct-contact" keyswitch keyboards avoided this problem by having isolation diodes for every keyswitch. These early keyboards had "n-key" rollover, which means any number of keys can be depressed and the keyboard