What is a browser computer terms?

Technically it can be any mean of looking through any type of collection: to browse through a collection.

I do believe though that in your specific case, you mean a "web browser". This is the program which lets you look through the world wide web: the internet.

If you that wasn't helpful , a browser is the program you used to access this website. Examples of browsers include Internet Explorer, Mozilla Firefox, Opera, Netscape Explorer, safari, etc...