What is "topcat"

thumb|Class Symbol thumb|TOPCAT K1 with 18 ft LOA thumb|TOPCAT K2 with 17 ft LOA thumb|TOPCAT K3 with 16,1 ft LOA

The Topcat is a one-design sailing catamaran boat class, which is divided into several boat sizes.

TOPCAT is an interactive graphical viewer and editor for tabular data. It is open-source software, originally written and still maintained by Mark Taylor, an astrophysicist from Bristol University.

Written in Java, TOPCAT can be used both standalone and within a web browser.