Apple PowerBook (2400c) - Manual (Page 64)

Adding memory to your computer
You can increase your computer’s memory by adding a RAM expansion card.
You can find out how much memory your computer has by choosing About
This Computer from the Apple (K) menu in the Finder.
You can purchase memory upgrades from Apple-authorized dealers. An
Apple-authorized dealer must install any memory upgrades you purchase.
Your Macintosh PowerBook also supports virtual memory, a feature that
makes use of hard disk space to provide additional RAM. Your computer
comes with virtual memory turned on. For information on using virtual
memory, see the “Memory” topic area of Mac OS Guide, available in the
Guide (h) menu.
Using infrared file transfer
Your Macintosh PowerBook has built-in infrared (IR) communication
that can send and receive files. You can exchange information with another
PowerBook or other device that has IR capability or with a desktop
computer that’s using an external IR module. In addition, you can use IR
communication to make a wireless connection to a network, by means of
a specialized device, such as Hewlett-Packard’s NetBeam IR, that uses
PowerBook-compatible software.
To transfer files, your computer and the other IR device must be within range
of each other, with the IR windows facing. Your computer must be within 3
feet of the network IR station to make a network connection using an Infrared
Data Association (IRDA)–compliant transfer rate of 1 megabit per second.
You use the Infrared control panel to select the method of IR communication
you want to use and to see a list of other IR-capable devices. For instructions
on IR file transfer, see “How do I send a file using IR technology?” in the
“Organizing Your Files” topic area of Mac OS Guide.
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