Definition: Data logging systems record data from one or more inputs and stores it on computer. The inputs can be sensors (e.g. temperature), or other input devices such as a keyboard or mouse.
Data logging systems usually store the data collected in a spreadsheet. This allows users to produce graphs and charts based on the data collected.
It also allows them to produce statistics such as average values over a period of time, e.g. average rainfall for the last 12 hours.
Data logging systems usually collect data at regular intervals.