Keyboard layout 10 includes its own implementation of a mnemonic QWERTY-based input method for Russian, which does not fully rely on assigning a key to every Russian letter, but uses the sh, sc, ch, ya (ja), yu (ju), ye (je), yo (jo) combinations to input ш, щ, ч, я, ю, э, and ё respectively. Virtual (on-screen) Russian keyboards allow entering Cyrillic directly in a browser without activating the system layout. This virtual keyboard offers YaZhERT (яжерт) variant. Another virtual keyboard supports both traditional ("MS Windows" and Typewriter) and some phonetic keyboard layouts, including AATSEEL "Student", Mac OS X Phonetic Russian layout and
ISO/IEC 9995 of the keytops; the standard defines their position independent of the characters of the primary layout. Thus, e. g. the Yen symbol “¥” occupies the shifted position on the 6th letter key of the second row, whether this is the Y key on a QWERTY keyboard (like the US layout) or the Z key on a QWERTZ keyboard (like the German layout). The diacritical marks contained in the common secondary group act as dead keys, i.e. they are to be entered before the base characters they apply to. This mechanism is also to be used for sequences of more than