Understand how text is mapped to unique decimal codes and then to binary, using ASCII, ISCII, and UNICODE.
Hook explaining that keys map to numbers.
Explanation of ASCII, 7-bit system, and key values.
In the early 1960s, computers couldn't easily communicate because they represented keyboard keys in different ways. The solution was ASCII (American Standard Code for Information Interchange).
It became the universal language for basic character representation on digital systems.
Visual showing the word DATA converting to ASCII then binary.
Each letter is mapped to an ASCII decimal code, which is then translated into a 7-bit binary format the computer can process.
Fill in the blanks for ASCII concepts.
The encoding scheme was developed in the early 1960s to standardise character representation and is still the most commonly used coding scheme. It initially used bits to represent characters, meaning it could encode a total of 128 different characters on the English keyboard. When a key is pressed, it is internally mapped to a unique decimal value; for example, the decimal value for the capital letter 'A' is . Because this original scheme only encoded English characters, an 8-bit standard called was developed in the mid-1980s for Indian language character sets. Eventually, a universal standard called was developed to incorporate all the characters of every written language in the world. The overall mechanism of converting data into an equivalent cipher using a specific code is called , which is essential for digital systems to process textual data into binary numbers.
Explanation of ISCII for Indian scripts and UNICODE for universal coverage.
While ASCII was revolutionary, it had a major limitation: it only encoded the English character set.
To facilitate the use of Indian languages on computers, ISCII (Indian Script Code for Information Interchange) was developed in the mid-1980s.
Visual comparison of ASCII, ISCII, and UNICODE capacity.
Encoding schemes evolved from 7-bit English-only ASCII to the universal UNICODE standard, which encompasses all world languages.
Multiple choice question differentiating the standards.
An international software team is upgrading a legacy messaging system to support global users. Which of the following statements about their encoding options is TRUE?