In the consumer's sense (like if I showed my mother something, asked her what it was, and have her say "oh, that's a computer") it would be a laptop, a desktop, and that's it.
That would be a PC, not a computer.
More likely, to your mom, a computer would be a big Univac or IBM mainframe with spinning tape drives or a front panel with tons of blinky lights. Look at the movies from when your mom was a kid, 1983 "Wargames" is a good example.