Character set of letters and numbers.

Identifier combining alphabetic and numeric characters.

Code or password using alphanumeric symbols.

Format including both letters and digits in data entries.

String containing a mixture of alphabets and numerals.

**Alphanumeric Characters**: Comprising letters and numbers together.

**Security Codes**: Related to passwords using letters and digits.

**Data Formats**: Pertaining to formats that include both types of characters.

**Identifiers**: Describing unique labels with mixed character sets.

**Input Validation**: Referring to criteria allowing only alphanumeric entries.

**Programming Variables**: Relating to variable names containing both elements.

**Usernames/IDs Creation**: Involving combinations for account identifiers.