Conventional PC keyboards are like those layouts you saw in Chapter 1. Conventional desktop keyboards contain 101 or more keys (many have 104 or 105 keys), while conventional laptop keyboards contain around 85 keys, with some of those keys performing additional functions via modifier keys (typically the function key). Some wide-screen laptops are large enough to include full keyboards of 101 keys or more.
Chapter 1 also showed layouts for conventional Mac keyboards. Most Mac desktop keyboards contain between 101 and 115 keys, while most PowerBook and iBook keyboards have between 77 and 82 keys (some of which perform additional functions using the [Fn] key).