Volapuk encoding (Russian: кодировка "волапюк", kodirovka "volapük") or latinica (латиница) is a slang term for rendering the letters of the Cyrillic script with Latin ones. Unlike Translit, in which characters are replaced to sound the same, in volapuk characters can be replaced to look or sound the same.
The name Volapuk encoding comes from the constructed language Volapük, for two reasons. Cyrillic text written in this way looks strange and often funny, just as a Volapük-language text may appear. At the same time, the word "Volapük" ("Волапюк/Воляпюк" Volapyuk/Volyapyuk in Russian) itself sounds funny to Russian ears, so the name stuck.
The term was popularized by its use in the first Soviet commercially available UUCP and TCP/IP network, RELCOM (a typical networking software package included Cyrillic KOI-8 to Volapuk transcoding utilities called tovol and fromvol, originally implemented by Vadim Antonov), making it the likely origin of the usage of Volapuk as applied to Cyrillic encoding.
Volapuk and Translit have been in use since the early days of the Internet to write e-mail messages and other texts in Russian where the support of Cyrillic fonts was limited: either the sender did not have a keyboard with Cyrillic letters or the receiver did not necessarily have Cyrillic screen fonts. In the early days, the situation was aggravated by a number of mutually incompatible computer encodings for the Cyrillic script, so that the sender and receiver were not guaranteed to have the same one. Also, the 7-bit character encoding of the early days was an additional hindrance.