Published by Salif November 2nd, 2006
in layout e design and glossário.
character set encoding — a system for encoded representation of textual data that specifies the following: (1) a coded character set, (2) one or more character encoding forms and (3) one or more character encoding schemes.
character encoding form — a system for representing the codepoints associated with a particular coded character set in terms of code values of a particular datatype or size. For many situations, this is a trivial mapping: codepoints are represented by bytes with the same integer value as the codepoint. Some encoding forms may represent codepoints in terms of 16- or 32-bit values, though, and some 8-bit encoding forms may be able to represent a codespace that has more than 256 codepoints by using multiple-byte sequences. Most encoding forms are designed specifically for use in connection with a particular coded character set; e.g. UTF-8 is used specifically for encoded representation of the Universal Character Set defined by Unicode and ISO/IEC 10646. Some encoding forms may be designed for use with multiple repertoires, however. For example, the ISO 2022 encoding form supports an open collection of coded character sets and specifies changes between character sets in a data stream using escape sequences.
codepoint — a numeric value used as an encoded representation of some abstract character within a computer or information system. Codepoints are integer values used to represent particular characters within a particular encoding.
coded character set — an abstract character repertoire together with an assignment of numeric codepoints for each character; a collection of encoded characters. Also called a codepage.
UTF-8 — an encoding form for storing Unicode codepoints in terms of 8-bit bytes. Characters are encoding listing sequences of 1-4 bytes. Characters in the ASCII character set are all represented using a single byte. [http://www.unicode.org/unicode/faq/utf_bom.html]
Published by Salif October 18th, 2006
in glossário.
A keyboard shortcut is a combination of keys that, when pressed simultaneously, perform some task that ordinarily requires use of a mouse or other input device and may take longer to do. In Windows XP, for example, pressing Control-Alt-Delete will bring up the task manager utility for application and system monitoring and control. Other popular […]
Published by Salif October 18th, 2006
in glossário.
The computer keyboard uses the same key arrangement as the mechanical and electronic typewriter keyboards that preceded the computer. The standard arrangement of alphabetic keys is known as the Qwerty (pronounced KWEHR-tee) keyboard, its name deriving from the arrangement of the five keys at the upper left of the three rows of alphabetic keys. This arrangement, invented for one of the earliest mechanical typewriters, dates back to the 1870s. Another well-known key arrangement is the Dvorak (pronounced duh-VOR-ak, not like the Czech composer) system, which was designed to be easier to learn and use. The Dvorak keyboard was designed with the most common consonants on one side of the middle or home row and the vowels on the other side so that typing tends to alternate key strokes back and forth between hands. Although the Dvorak keyboard has never been widely used, it has adherents.
Because many keyboard users develop a cumulative trauma disorder, such as carpal tunnel syndrome, a number of ergonomic keyboards have been developed. Approaches include keyboards contoured to alleviate stress and foot-driven pedals for certain keys or keyboard functions.
Published by Salif October 18th, 2006
in layout e design and glossário.
“Most PC users are all too familiar with Ctrl + Alt + Del, but how many of us know the origins of this button combination? Find out after the jump.
David Bradley originally designed Control-Alt-Escape to trigger a soft reboot, but he found it was too easy to bump the left side of the keyboard and reboot […]
Published by salifsilva October 3rd, 2006
in ergonomia and glossário.
A L.E.R. está frequentemente associada a profissionais que usam computadores: programadores, analistas de sistemas, digitadores, operadores de computadores. No tempo da máquina de escrever isto não existia. No computador é possível digitar páginas e mais páginas de texto sem levantar os dedos do teclado. Já a boa e velha máquina de escrever não nos permite […]
Published by Salif September 7th, 2006
in glossário.
Any machine that feeds data into a computer. For example, a keyboard is an input device, whereas a display monitor is an output device. Input devices other than the keyboard are sometimes called alternate input devices. Mice, trackballs, and light pens are all alternate input devices. by http://www.webopedia.com/TERM/i/input_device.html
