When we open an app to view a photo we have taken, or listen to our favourite song, the computer gets the information that has been stored in its memory. A computer's memory is where it stores the ...

32 control codes (mainly to do with printing) 32 punctuation codes, symbols, and space 26 upper case letters 26 lower case letters numeric digits 0-9 We tend to say that the letter ‘A’ is the first ...