a computerised information system giving details of current share prices and stock market transactions on the London Stock Exchange. Dealers list their offer and bid prices on SEAQ, and transactions are carried out on the basis of the information shown on the screen and are also recorded on the SEAQ database in case of future disputes. nouna computerised information system giving details of current share prices and stock market transactions on the London Stock Exchange. Dealers list their offer and bid prices on SEAQ, and transactions are carried out on the basis of the information shown on the screen and are also recorded on the SEAQ database in case of future disputes.Full formStock Exchange Automated Quotations system