1. Short for Terms Of Service, TOS is a contract or agreement made between a company and the end-user using the product. If the user voids the agreement the user may be inflicted with penalties. For example, a user disobeying a TOS may be banned from the service. Like many companies Computer Hope's TOS is found through our legal section.
3. Short for Tape operating system, TOS is an operating system developed by IBM and ran from a tape drive in early computers in the 1960's. With the many limitations of tape drives TOS was replaced with the Disk operating systems still in use today.
4. Short for Teacher Over Shoulder, see the TOS definition for further information.