hi
ASCII
It is an input device for a computer with letters, numbers and symbols on it. It can also be used in playing music.
Individual letters, numbers or special symbols such as @#$%^& found on a computer keyboard.
A combination of letters and numbers and symbols is a character set. To use a formula to combine letter and numbers and symbols is known as concatenation.
In computer programming, a string can be made up of; all numbers (a numeric string,) all letters, (an alphabetic string,) or a mixture of numbers, letters, and symbols, (an alphanumeric string.)
OUIJA
because of my nan
It makes clear that the following symbols should be read as numbers. Some Braille symbols do double duty as letters and numbers, and there are symbols that flag that the following should be read as numbers or as letters. en.m.wikipedia.org/wiki/English_Braille#Contractions
Algebra makes use of letters and mathematical symbols.
Just use letters and numbers, no symbols.
one that has a lot of random letters, numbers, and symbols
because the Ancient Romans did not have symbols for numbers.