and-linux

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A subversive group or device placed within enemy ranks.
2. n. The hollow wooden horse in which, according to legend, Greeks hid and gained entrance to Troy, later opening the gates to their army.
3. n. Computer Science A program that appears to be legitimate but is designed to have destructive effects, as to data residing in the computer onto which the program was loaded.