The main difference between ASCII and
Unicode is the number of characters they can represent. ASCII is a character encoding standard that assigns unique numbers to 128 characters, while Unicode is a more comprehensive character encoding standard that assigns unique numbers to over 149,000 characters. Another key difference between ASCII and Unicode is the way they are encoded. ASCII uses 7 or 8 bits to represent each character, while Unicode uses a variable number of bits, typically 16 or 32. In summary, ASCII is a limited
character encoding standard that was developed for use in early computers and communication systems, while Unicode is a more comprehensive and flexible standard that is widely used in modern computing and on the internet.