Final answer:
The most common data code for text files, PC applications, and the Internet is ASCII, developed by the American National Standards Institute. ASC, developed by the American National Standards Institute.
Step-by-step explanation:
The most common data code for text files, PC applications, and the Internet is ASCII, developed by the American National Standards Institute (ANSI).
ASCII (American Standard Code for Information Interchange) is a character encoding standard that represents each character as a unique numeric value. It is widely used in computer systems and applications.
Unicode is another data code that is commonly used, especially for international characters and languages. Unlike ASCII, Unicode can represent thousands of characters from various writing systems.
Binary and Hexadecimal are not specific data codes for text files, PC applications, or the Internet. They are number systems used for representing data in computers, but not primarily for text encoding.