Created by Skye Boulton about 6 years ago
Project Management - A methodical, planned and ongoing process that guides all development task and resources throughout a projects development.Team - Two or more people with complimentary skills, behaviours and personalitites who are committed to achieving a common goal.System Analyst - A person who analyses systems, determines requirements and designs new information systems.Requirements - Features, properties or behaviours a system must have to achieve its purpose. Each requirement must be verifiable.Requirements Prototype - A working model of an information system, built in order to understand the requirements of the system.Feasible - Capable of being achieved using the available resources and meeting the identified requirements.User interface - Part of a software application that displays information of the user. The user interface provides the means by which users interact with software.Acceptance Tests - Formal tests conducted to verify whether or not a system meets its requirements. Acceptance testing enables the client to determine whether or not to accept the new system.Procedure - The series of steps required to complete a process successfully.Evaluation - The process of examining a system to determine the extent to which it is meeting its requirementsErgonomics - The study of the relationship between human workers and their work environment.
Information - is the meaning that a human assigns to data. Knowledge is acquired when information is received. Purpose - The aim or objective of the system and the reason the system exists. The purpose fulfils the needs of those for whom the system is created. Environment - The circumstances and conditions that surround an information system. Everything that influences or is influenced by the system. Participants - People who carry out or initiate information processes within an information system. An integral part of the system during information processing. Information technology - The hardware and software used by an information system to carry out its information process. Information processes - What needs to be done to transform the data into useful information. These actions coordinate and direct the system's resources to achieve the system's purpose. Flat-file database - A single table of data stored as a single file. All rows (records) are composed of the same sequence of fields (attributes). Normalisation - The process of normalising the design of the database to exclude redundant data. Progressively decomposing the design into a sequence of normal forms. Redundant data - Unnecessary duplicate data. Reducing or preferably eliminating data redundancy is the aim of normalisation. Hypertext - Bodies of text that are linked in a non-sequential manner. Each block of text contains links to other blocks of text. Hypermedia - An extension of hypertext to include non-sequential links with other media types, such as image, audio and video. Metadata - Data that defines or describes other data. Data independence - The separation of data and its management from the software applications that process the data. Back up - To copy files to a separate secondary storage device as a precaution in case the first device fails or data is lost. Encryption - The process of making data unreadable by those who do not possess the decryption key. Decryption - The process of decoding encrypted data using a key. The opposite of encryption. View (or User View) - The restricted portion of a database made available to a user. Views select particular data but have no affect on the underlying organisation of the database. Search - To look through a collection of data in order to locate required data. Sort - To arrange a collection of items in some specified order. QBE (Query By Example) - A visual method for specifying a query. Often search criteria are entered into fields within what appears to be an empty record. Centralised Database - A single database under control of a single DBMS. All users and client applications connect directly to the DBMS. Distributed Database - A set of connected databases stored on multiple computers that appears to users as a single database. Search Engine - A program that builds an index of website content. Users can search the indexed content to locate relevant website content. Data Validation - A check, at the time of data collection, to ensure the data is reasonable and meets certain criteria. Data Integrity - A measure of how correct and accurately data reflects its source. The quality of the data. Data Verification - A check to ensure the data collected and stored matches and continues to match the source of the data. Data Mining - The process of discovering non-obvious patterns within large collections of data.
MAC Address - Media Access Controller Address hardwired into each device. A hardware address that uniquely identifies each node on a network. Protocol - A formal set of rules and procedures that must be observed for two devices to transfer data efficiently and successfully. Handshaking - The process of negotiating and establishing the rules of communication between two or more devices. Bits per second (bps) - The number of bits transferred each second. The speed of binary data transmission. Baud (or baud rate) - The number of signal events occurring each second along a communication channel. Equivalent to the number of symbols per second. Bandwidth - The difference between the highest and lowest frequencies in a transmission channel. Hence bandwidth is expressed in hertz (Hz), usually kilohertz (kHz) or megahertz (MHz). Teleconference - A multi-location, multi-person conference where audio, video and/or other data is communicated in real time to all participants. Virtual organisation - An organisation or business whose members are geographically separated. They work together using electronic communication to achieve common goals. Client-server Architecture - Servers provide specific processing services for clients. Clients request a service, and wait for a response while the server processes the request. Authentication - The process of determining if someone, or something, is who they claim to be. Physical Topology - The physical layout of devices on a network and how the cables and wires connect these devices. Logical Topology - How data is transmitted and received between devices on a network regardless of their physical connections. Modulation - The process of encoding digital information onto an analog wave by changing its amplitude, frequency or phase. Demodulation - The process of decoding a modulated analog wave back into its original digital signal. The opposite of modulation. Fault Tolerance - The ability of a system to continue operating despite the failure of one or more of its components.
Transaction - A unit of work composed of multiple events that must all succeed or must all fail. Events perform actions that create and/or modify data.Data integrity - A measure of how correct and accurately data reflects its source. The quality of the data.Data validation - A check, at the time of data collection, to ensure the data is reasonable and meets certain criteria.Data verification - A check to ensure the data collected and stored matches and continues to match the sources of the data.Back up - To copy files to a seperate secondary storage device as a precaution in case the first device fails or data is lost.Bias - An inclination or preference towards an outcome. Bias unfairly influences the outcome. Batch transaction processing - the collection and storage of data for processing at a scheduled time or when there is sufficient data. Real time transaction data - the immediate processing of data.
Multimedia systems - information systems that include combinations of media, including text & numbers, audio, images and/or animations, video and hyperlinks.Cel-based animation - A sequence of cels (images) with small changes between each cel. When played the illusion of movement is created.Path-based animation - A line (path) is drawn for each character to follow. When played each character moves along their line in front of the background.
Information systems and databases
Transaction Processing Systems