The key is the Russian - Phonetic keyboard. It isn't the keyboard layout that is used in Russian. It maps the Cyrillic letters instead to the equivalent letters

The key is the Russian - Phonetic keyboard. It isn't the keyboard layout that is used in Russian. It maps the Cyrillic letters instead to the equivalent letters in the latin alphabet on the regular QWERTY keyboard. This lets you type what you want in Cyrillic very quickly. You only need to memorize the locations of the extra letters with no latin equivalent. (e.g. c = ц, which is reasonable, but ` = щ because there was no where else to put it)