Warts can grow on all parts of your body. They can grow on your skin, on the inside of your mouth, on your genitals and on your rectal area. Common types of HPV tend to cause warts on the skin (such as the hands and fingers), while other HPV types tend to cause warts on the genitals and rectal area. Some people are more naturally resistant to the HPV viruses and don't seem to get warts as easily as other people.
And, it has Canon's best-yet low-light AF capabilities, at the center AF point. It's Canon's first-ever EOS model with integrated GPS and Wi-Fi capabilities, answering requests from pros and advanced amateurs. Ideal for many travel, nature, landscape and wildlife situations: outstanding low-light performance, excellent detail and image quality, and integrated GPS.
FD and EF are the lens mount types. FD was Canon's older lens mount style, used on cameras like the F-1 and AE-1 (among many others). FD is not known to stand for anything. EF is the newer lens mount, introduced with the Canon EOS cameras in 1987. EF stands for Electro-Focus. Your Rebel XTi has an EF-S lens mount.