handset

Hello!
I don’t understand the meaning of this sentence: ‘How many fingers do you use when you type on a computer handset?’
What does ‘type on a computer handset’ mean?
Thank you for your time!

phone’s keyboard is called handset, so in my opinion in this case it’s something about all bottoms. P.S. all bottoms and keyBOARD are different things.

Without additional comment, I would interpret that as ‘how many fingers do you use when you type on a computer keyboard?’ but ‘handset’ is not the correct choice of word there.