What are the isolated form of Arabic letters used for?

Arabic is written with a "linked" alphabet. The letters of each word are connected together to shape words. This means that each Arabic letter has three shapes, one for the beginning, middle and end of the word.

What are the isolated form of Arabic letters used for?

التعْلِيقَات

فِيدْيُوهَات ذاتُ صِلَة

שִׁעוּרִים מֻמְלָצִים

الدروس الموصى بها