When Factor starts, the first thing it does is call a word:

boot ( -- )

Next, initialization hooks are called:

do-startup-hooks ( -- )

Initialization hooks can be defined:

add-startup-hook ( quot name -- )

Corresponding shutdown hooks may also be defined:

add-shutdown-hook ( quot name -- )

The boot quotation can be changed:

startup-quot ( -- quot )

set-startup-quot ( quot -- )

When quitting Factor, shutdown hooks are called:

do-shutdown-hooks ( -- )