Pilots use iPads for all of the charts and checklists. Even having two iPads (one as a backup) is much lighter and thinner (and easier to update) than the paper copies it replaces.

Electronic flight bag, contains all the information a pilot needs.

This is the app they use https://en.m.wikipedia.org/wiki/ForeFlight

747_getting_started.pdf

so_you_want_to_be_a_pilot.epub