Key bindings can be customized by editing the controls.ini file.  Several versions of quick reference pages exist for default key bindings:

Chalta's Artemis Console Hotkey Maps (v. 1.7): Default key bindings for v1.7 for Helm, Weapons, Engineering, Science, and Comms consoles.

Chalta's Artemis Console Hotkey Maps (v. 2.0): Default key bindings for v2.0 for Helm, Weapons, Engineering, Science, and Comms consoles.

Michael Hermanns' Artemis Key Bindings (v. 2.0): Default key bindings for v2.0 for Helm, Weapons, Engineering, Science, Comms, Captain, and GM consoles.