Blank

From Esolang

Blank is a stack-based esoteric programming language developed by Andrew Turley in 1997. Blank programs use single-character instructions contained within braces and numbers contained within brackets. Each number is an 'instruction' in the sense that 'executing' a number means to push it onto the stack.

Blank was heavily influenced by Befunge-93, except that it is one-dimensional; thus it is sometimes informally referred to as Unefunge-93.