standard (aat Terms)

Analysis - Requriement Specification

Applications Software - payroll programs, stock control programs, a single aplications program is often called a job , a job can divided into task.

Asynchronous - Asynchronous mode of transmission refers to the process of encoding data in a continuous steam.

Batch Data - for the cake of convenience and to facilitate control routines, it is customary, particular with operations performce offline, to process source documents in batches. Bindery : A database of definitions for entities such as users, groups , and work groups. The bindery lets you design an organized and secure operating environment based on each entities requirements.  The bindery has three components. Objects - Physical or logical entities hava a names. Properties - characteries of each object.

Computer Bureaus - an organisation providing electronic data.

Control Programs - controls the way in whch hardware is used, usually at least two programs are within main storage. one is applications and the other is control program ..

Data encryption - scrambles all the data in the course of transmission and reassemble it at the receiving encl. Data collection : Data collection is the process of getting data in a form suitable for processing against master file.  Data Preparation : Transcription of data from the source document to a machine, sensible medium . Two kinds, original trnscription itself, verification process.

Design - system specification

Dumping - data copy out from database.

Duplex - transmission is possible is two directions simulataneously;

Executive or Supervision Programs - which are able to allow a number of applications programs to run concurrently and in sequence without the intervention of user.

Feasibleity Study -

Half duplex- transmission is possible in two direction but not at once;

Hit rates - the hit ratio refers to the number of records requiring amendment on a file compared to the total record population. High hit rate files are most effieniently processed bybatchmethods, have hit rate file are often processed by direct access methods.  initial study - job specification

management - terms of refeence

modem - encoder, decoder , digitial -pulses -digitial -analogue

Multiplexor - serveral terminal devices connected to a processor;

Object - an entity that is defined on the network and given access to the file server. Object types include uses, group , servers. Print servers, and archieve servers and are defined in the file server's bindery. Operating System - allow a number of programs to be run on the computer withut human intervention by an operator.  Polling - Polling is the name given to the means of controlling the multiple use of transmission lines. The comuter signals and terminal device in turn to ascertain whether they wish to transmit data. Rolling is resorted to when multiplexors are not available and each terminal device has its own independent line to the host computers.

Power - is the potential to influence others to act according to our wishes.

Property : A description feature of a bindery object such as : A password, account restriction, an account balance, an internet work address, a list of out clients.  Purging - is the process by which the entire contents of a tape or disk are erased. Once purged, the files can be used to hold fresh data.

Remote - job entry - this is a term of describe a computer configuration by which a computer user has access to a manframe located off his or her own permises.

Routers : Internetworks that adopt the packet-switching protocol often use routers to keep routing tables; answer queries, boadcat ouuting information, and deliver packets to their destinations. Each router constantly broadcasts its current status, updates other router's distance and location in its routing table, abd coose the most efficient rout whan a change of routing occurs in the internetwork (such as a file server going down, or a new network being added). Simplex - transmission is possible in one direction only.

Synchronous - Synchronous receiver expects certain bits to arrive at  repreat ermined intervals by means of interal clock pulses.

System Software - provide by the manufacturer this software will be programs which contribute to the control and performance of the computer system. Such programs are given the collective name system software. e.g. DBMS.

Terminals - input / output devices

Time-sharing - when multi-access interactive users are to use a system which gives each user both a fair share of processor time and conversational facilities. A clock is used to divided up processor time into 'time slices'. A typical time-slice lasts less than one hundredth of one second.

Translators - converts statements written in one language into statements in another language.

Uncertainty - is defined as the lack of information about future events that make their outcomes less predictable.

Updating - a master file amend