It is often not desirable to deal with the inputs until a certain number have occurred or a set time has passed. So they are stored until the system comes online to process the data in one 'batch'. Batch processing is usually fully automatic unlike 'real-time' or transaction processing which are interactive.
For example
- A stock control programme may store records of every item sold in a shop that day. Then, at the end of each day it calculates what needs to be ordered.
- An online competition stores all the entries until it is time to find the winner.
- Electricity, gas and telephone bills are usually calculated on a monthly basis.
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