Whitespace is a programming language developed by Edwin Brady and Chris Morris at the University of Durham (also developers of the Kaya and Idris programming languages). It was released on 1 April 2003 (April Fool's Day).

whitespace
Whitespace
On whitespace and stability in physical synthesis
Satisfying whitespace requirements in top-down placement
Hierarchical whitespace allocation in top-down placement
Interference Analysis of TV-Band Whitespace
On Whitespace and Stability in Mixed-Size Placement and Physical Synthesis
Systems and methods for dynamic whitespace spectrum management
Hybrid Page Segmentation with Efficient Whitespace Rectangles Extraction and Grouping
Hybrid Page Segmentation with Efficient Whitespace Rectangles Extraction and Grouping