infomation technology the internet and you binary

Information Representation• All information must be rendered into binary in order to be stored on a computer.. • Besides numbers, almost all applications must store characters and string

• Information Representation

• Characters and Images

• Fundamentals of Digital Computer Design

Information Representation

• All information must be rendered into binary in order to be stored on a computer.

• Besides numbers, almost all applications must store characters and string information.

• Images are pervasive in today’s internet world and must be rendered in binary to be handled by internet browsers.

Character Representation

• ASCII – PC workstations

• EBCDIC – IBM Mainframes

• Unicode – International Character sets

• ASCII

• Expanded name

American Standard Code for Information Interchange

• Area covered

7-bit coded character set for information interchange

• Characteristics/description

Specifies coding of space and a set of 94 characters (letters, digits and punctuation or mathematical symbols) suitable for the interchange of basic English language documents Forms the basis for most computer code sets

ASCII

• EBCDIC

• Expanded name

Extended Binary Coded Decimal Interchange Code

• Proprietary specification developed by IBM

• Characteristics/description

A set of national character sets for interchange of documents between IBM mainframes Most

EBCDIC character sets do not contain all of the

characters defined in the

• EBCDIC

• Usage

Not much used outside of IBM and similar

mainframe environments When transmitting

EBCDIC files between systems care needs to be taken to ensure that the systems are set up for the relevant national code set

EBCDIC

Unicode can represent all of the world's characters in modern computer use, including technical symbols and special characters used in publishing Because each Unicode code value is 16 bits wide, it is possible to have separate values for up to 65,536 characters Unicode-enabled functions are often referred to as "wide-character"

functions

Note that the implementation of Unicode in 16-bit values is referred to

as UTF-16 For compatibility with 8- and 7-bit environments, UTF-8 and UTF-7 are two transformations of 16-bit Unicode values For more information, see The Unicode Standard, Version 2.0.