Keyboard layout are named after the first several letters that take over the 'QWERTY' row on the Latin keyboard. They differ by where a few of the letters are placed. For example, some have Cyrillic 'B' (which is pronounced 'V') on the Latin 'W' key (after the German transliteration of B), while others have it on the Latin 'V' key. The images of AATSEEL "Student", YaZhERT (яжерт) and YaWERT (яверт) are shown on this page. There are also variations within these variations; for example the Mac OS X Phonetic Russian layout is YaShERT but differs in placement of ж and э. Windows
Portuguese keyboard layout are specified in the ABNT NBR ("Norma Brasileira Regulamentadora") 10346 variant 2 (alphanumeric) and NBR 10347 (numeric portion) standards. Portuguese keyboard layout There are two QWERTY-based keyboard layouts used for the Portuguese language. Additionally, there are two variants of the Dvorak Simplified Keyboard designed for Brazilian Portuguese. Typewriters in Portuguese-speaking countries generally have a separate extra key for "Ç", and a dead key for each diacritic except the cedilla; so that "Á" is obtained by typing first the acute accent, then the letter "A". The same thing happens with computer keyboards, except when using an "English – International" keyboard layout,