For PCs i don't suggest nortan anti viruse because it can block you from doing surtain things but if you are on the computer adminstrater you can turn it off.
For MACs you don't need a firewall because MACs can't have viruses so far.
Brand name-McIntosh
Mac computers don't really have that good of security, rather most of the big infections aren't designed to infect a Mac.
No . go out and buy a mac.
Mac (short for Macintosh) is the name of the range of computers that Apple make.
Probably not Macs are pretty good
Apple MAC Company
The MacBook got its name by mac the brand of computers, and book. The word that apple uses for laptop.
Each computer has a unique name, IP address and MAC address. (not MAC as in McIntosh.)
Dell, Toshiba, HP, Sony, Apple (Mac computers)
It is simply called "Mail".
Mac (as in Mac computers made by Apple) is short for Macintosh, which was one of their earlier computers... They later on decided to shorten it to Mac...
The Mac, running any version of OS X, has a built-in firewall that is sufficient. In Leopard, the firewall is located in the Security pane of System Preferences.