erasable optical disk
A type of optical disk that can be erased and loaded with new data. In contrast, most optical disks, called CD-ROMs, are read-only.
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- ergonomic mouse
A type of mouse that has been designed to reduce muscle strain and decrease discomfort (while using the mouse) associated with a injuries such as carpal tunnel syndrome, arthritis, and tendonitis. Compared to other mice, an ergonomic mouse is designed to fit a more natural hand position when being used.
- Ergonomics
The science concerned with designing safe and comfortable machines for humans. For example, one branch of ergonomics deals with designing furniture that avoids causing backaches and muscle cramps. In the computer field, ergonomics plays an important role in the design of monitors and keyboards. Another term for ergonomics is human engineering.
- erlang
A unit of measurement of traffic density in a telecommunications system. The erlang describes the total traffic volume of one hour, or 3600 seconds. For example, 60 calls in one hour, each lasting 5 minutes, results in the following number of erlangs: minutes of traffic in the hour = number of calls x duration minutes […]
- error correction
The process of correcting errors in data that may have been corrupted during transmission or in storage. Data transmissions are always subject to corruption due to errors, but in video transmissions, error correction needs to deal with the errors but not retransmit the corrupted data. Video errors are corrected using a process of forward error […]
- error detection
In communications, error detection refers to a class of techniques for detecting garbled messages. Two of the simplest and most common techniques are called checksum and CRC. More sophisticated strategies include MNP and CCITT V.42 .