“The first is the primary pump, while the other is standing by as a backup if needed.”

“He was getting increasingly enraged after I handed him his parking ticket, and I duly called for backup.”

“The guy shrugged, not seeming to care that there was a huge backup of thirsty people bottlenecking behind him.”

“Some data from the Science Faculty was corrupted and had to be restored from backups.”

“I will make tertiary backups of the movies for off-site storage in Fargo, in case fire consumes both Jasperwood and the Star-Tribune building.”

“The team spent the rest of the draft wisely looking for backups at depth-shy positions and special team players.”