the free energy of the reactants is greater than that of the products. induced-fit model. A model of enzyme-catalyzed reactions in which the enzyme changes shape when substrates bind to the active site; this change in shape is called an induced fit. lock-and-key model A model of enzyme-catalyzed reactions in which the enzyme is a rigid lock and the substrates are the keys that fit into the lock and then react.
System administrator. For the privileged user account, see Superuser. A system administrator, or sysadmin, is a person who is responsible for the upkeep, configuration, and reliable operation of computer systems; especially multi-user computers, such as servers.
DEFINITION of 'Accounting Information System-AIS'. The collection, storage and processing of financial and accounting data that is used by decision makers.An accounting information system is generally a computer-based method for tracking accounting activity in conjunction with information technology resources.ix elements compose the typical accounting information system: 1  People-the system users. 2  Procedure and Instructions-methods for retrieving and processing data. 3  Data-information pertinent to the organization's business practices. 4  Software-computer programs used to process data.