Does a computer do only two things? According to the book, Introduction to Computation And Programming Using Python by John V Guttag, a computer does only two things:


Store data
Manipulate data


But is this all? I mean, without I/O, can a computer be considered useful?
The statement is obviously false: my computer can make sounds and it's hard to see that that as either storing or manipulating data.  I suggest you just ignore it and move on, since producing this kind of list does nothing to help your understanding of computers, programming or anything else.