Standby
Standby may refer to:

Standby (air travel), a list in which passengers may request to be placed on to request an earlier or more convenient flight
Standby (theater), an actor or performer who will appear in a particular role if the regular performer is not present
Sleep mode (in electronics), also known as standby mode—a mode in which electronic appliances are turned off but still under power and ready to activate on command
Standby (or ACPI S3), an ACPI mode of a computer
Modern Standby (or InstantGo), a computer power management system
Standby power, energy consumed by an electronic device while it is turned off or in sleep mode
Standby (TV series), a South Korean sitcom
Standby Records, an American independent record label
"Standby", a song by Macintosh Plus from Floral Shoppe

See also
Please Stand By, a 2017 comedy-drama film
Stand By (disambiguation)