STR may refer to any of the following:
1. Short for suspend to RAM, STR is a process started when a computer enters suspend mode. Any information that is currently being utilized is stored in memory, allowing components in the computer to be turned off to conserve power. When the computer resumes activity, the stored information is then returned to its original state.
2. STR is an acronym for send to receive.
3. STR is shorthand for strength, which is commonly a specific attribute detailing how much attack power the character has. In MMO games, items that a character can utilize (armor and weapons) empowers them by increasing the amount of strength a character has.