Apple Macintosh PowerBook 150 - Manual (Page 24)

Putting your computer to sleep
When the PowerBook is in sleep, it has a darkened screen and appears to be
off, though it is still drawing battery power at a low level. The computer is on,
but almost completely inactive.
To put your PowerBook to sleep:
m
Choose Sleep from the Special menu.
Automatic sleep
If you don’t use the computer for several minutes, it goes to sleep
automatically. This conserves battery power.
To wake the computer, press any key on the keyboard (except Caps Lock). In
a few seconds, the screen will go back to the way it looked before the
computer went to sleep.
For more information on sleep and automatic sleep, see Chapter 6.
14 Chapter 1