Transliteration
Transliteration is the process of converting text from one script to another, for example from the Latin alphabet to Cyrillic. There are several types of transliteration, some which are based on simple letter substitution, and others that are based on phonetic transliteration, where the goal is to preserve the sound of a word in another language.
The written text in one script does not necessarily have sufficient detail to transliterate into another script. In most cases it is not possible to losslessly transliterate from the Arabic script into the Cyrillic script, as the Arabic script does not usually write short vowels, where the Cyrillic one does.