My name is Zeyaul and am working in a private company in USA as software engineer. My work load some time is not very heavy/loaded. So in a week sometime I feel like I have nothing to do till next assignment will be assigned to me. So in free time, I wanted to do some personal stuff in office itself like Islamic study, reading arabic language, or listening some bayan/lecture, etc. Sitting ideal is of no use so I keep doing Islam study when ever I am free.
How much is it permissible? Am I allowed to do study or I should seek permission from manager or I am not allowed at all?