To hold one end of a threaded connection while the other is turned to make up the joint. To ensure a secure connection, many types of threaded joints are made up to specific torque requirements in oil [..]

(1) When bond yields rise and prices fall, the market is said to back up. (2) An investor who swaps out of one security into another of shorter current maturity is said to back up.

To save files to a CD or USB drive so that they are kept in more than one place.

(1) To print on the second side of a sheet already printed on one side. (2) To adjust an image on one side of a sheet so that it aligns back-to-back with an image on the other side.

1767, "stand behind and support," from back (v.) + up. The noun meaning "a standby, a reserve" is recorded from 1952 (often written as one word, backup); specific reference to comp [..]

your files means to make copies of them regularly, preferably on a device separate from your computer, in case you lose the originals. This is very important!

Definition To reverse a market trend. For example, investors might indicate that the stock market backed up if a recent increase in share prices is suddenly met by a decline.

To print on the second side of a sheet already printed on one side. Such printing is called a backup.

is an increase in a security’s price, yield, or spread before issuance.

In information technology, backup refers to making copies of data so that these additional copies may be used to restore the original after a data loss event. These additional copies are typically cal [..]

Make a copy. It is advisable to copy all new data onto a floppy or CD as often as possible. This is normally done conscientiously until about two intensive writing weeks before a grand crash. There ar [..]

 Printing the second side of a sheet already printed on one side. 

To make copies of important files in case the originals are damaged. Data can be backed up on external hard drives

To assist in holding.

To hold one section of an object, such as a pipe or a nut, while another is being screwed into or out of it. A BACK UP WRENCH refers to any wrench being used to hold the pipe or bolt.

Printing the second side of a sheet already printed on one side.

(idiomatic,intransitive) To move backwards, especially for a vehicle to do so. (That beeping sound indicates that the truck is backing up.) (idiomatic,transitive) To move a vehicle backwards. [..]

(1) When bond yields rise and prices fall, the market is said to back up. (2) An investor who swaps out of one security into another of shorter current maturity is said to back up.