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Data and Telecommunications, terms, concepts and abbreviations.
(19 terms)
B8ZS
A coding technique that transmits T1 data at 1.536Mbps by inserting the pattern 00011011, with BPVīs in the fourth and seventh positions, wherever ones density requirements are not met by the unmodified data. It requires the CSU to not remove bipolar violations, and works only where the phone company equipment can tolerate it. This allows 64Kbps channels on a T1 (for example) rather then the base 56Kbps.
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Computer Hardware parts, abbreviations and concepts.
(6 terms)
Printed Circuit Board
It usually consists of a metallic conductor pattern on an organic insulating substrate, more complex circuits have several layers stacked togeather. After assembly where components are added, it is known as a printed wiring assembly (PWA).
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Graphic Design & prepress terms from desktop publishing to offset printing.
(14 terms)
JPEG
A compressed graphics format specifically designed for photographs. Itīs name an acronym that stands for Joint Photographic Experts Group. It works by changing the images data from colours to frequencies (that represent detail) using a FFT and then discarding some of the high detail data - the resulting image is slightly blurry but this is barely noticable by the human eye and represents a significant saving of space.
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Linux/Unix Terms and Commands.
(9 terms)
FTP
A protocol developed to enable the transfer of files across a network. It provides a reletively insecure username and password security but has been more recently enhanced to allow for SSL encryption to provide a secure password exchange.
To some extent the use of FTP has been superceeded by SFTP (a component of SSH) or the secure file transfer protocol. |
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Photography terms and concepts, including digital and traditional photographic techniques.
(11 terms)
RAM
RAM is a type of computer storage whose contents can be accessed in any order. This is in contrast to sequential memory devices such as magnetic tapes, discs and drums, in which the mechanical movement of the storage medium forces the computer to access data in a fixed order. It is usually implied that RAM can be both written to and read from, in contrast to read-only memory or ROM.
Computers use RAM to hold the program code and data during execution. In the first electronic computers, RAM wa... |
Web design termonology, concepts, and abbreviations.
(46 terms)
SQL
The standardized relational database language for defining database objects and manipulating data.
In laymans terms: the language that people and programs use to communitacte with a database. Example: to select all the items for a data column called "information" the SQL stament might look like: SELECT * FROM information |