This character is a Otro símbolo and is commonly used, that is, in no specific script.
The glyph is a square composition of the glyphs Latin Capital Letter H, Latin Capital Letter P. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+33CB offers a line break opportunity at its position, except in some numeric contexts.
El Wikipedia tiene la siguiente información acerca de este punto de código:
Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the imperial horsepower, which is about 745.7 watts, and the metric horsepower, which is approximately 735.5 watts.
The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses. It was later expanded to include the output power of other types of piston engines, as well as turbines, electric motors and other machinery. The definition of the unit varied among geographical regions. Most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on 1 January 2010, the use of horsepower in the EU is permitted only as a supplementary unit.