gcse bitesize
BBC - GCSE Bitesize: Expert systems
Computers can be programmed with rules to use information [information: data with context or meaning ] to make simple decisions. This is knowledge [knowledge: the ability to understand information and, to then form judgements, opinions, make predictions and decisions based on that understanding ] that has been passed on from the programmer. A simple example of this is a spreadsheet [spreadsheet: A spreadsheet is made up of cells, rows and columns. Each cell holds a piece of numeric (numbers) or alphanumeric (text) data. Cells can also contain formulae to calculate their contents.