execution environment (EE)
In Unified Modeling Language (UML) an execution environment (EE) is a type of node (or part of a node) that represents a particular execution platform, such as an operating system or a database management system. Execution environments are used to describe the context in which the execution of a model takes place. Execution environments are typically part of another node that models the computing hardware of a system.
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- expanded memory
Also known as EMS (Expanded Memory Specification), expanded memory is a technique for utilizing more than 1MB of main memory in DOS -based computers. The limit of 1MB is built into the DOS operating system. The upper 384K is reserved for special purposes, leaving just 640K of conventional memory for programs. There are several versions […]
- expansion board
A printed circuit board that you can insert into a computer to give it added capabilities. For example, all of the following are expansion boards: video adapters graphics accelerators sound cards accelerator boards internal modems Expansion boards for PCs can be half-size (also half-length) or full-size (also full-length). Most PCs have slots for each type […]
- expansion bus
A collection of wires and protocols that allows the expansion of a computer by inserting printed circuit boards (expansion boards). Traditionally, PCs have utilized an expansion bus called the ISA bus. In recent years, however, the ISA bus has become a bottleneck, so nearly all new PCs have a PCI bus for performance as well […]
- Expansion Slot
An opening in a computer where a circuit board can be inserted to add new capabilities to the computer. Nearly all personal computers except portables contain expansion slots for adding more memory, graphics capabilities, and support for special devices. The boards inserted into the expansion slots are called expansion boards, expansion cards , cards , […]
- Expert System
A computer application that performs a task that would otherwise be performed by a human expert. For example, there are expert systems that can diagnose human illnesses, make financial forecasts, and schedule routes for delivery vehicles. Some expert systems are designed to take the place of human experts, while others are designed to aid them. […]