Examples of fraud include the unauthorized obtaining of information from a computer e.g. ‘hacking`, taking unauthorized copies of company records, trade secrets, etc. The ‘Salami` fraud this is when the perpetrator carefully ‘skims` small sums from the balances of a large number of accounts in order to bypass internal controls and escape detection. Software theft is also becoming more common with the comparative ease of making copies of computer software which has led to a huge illegal market, depriving authors of very significant revenues. This study provides an overview of some aspects of computer fraud.