In Australia, children undergo twelve years of formal education (plus Preschool, Kindergarten and/or a preparatory grade or Prep), usually starting at age four, five or six, and finishing at age 16, 17 or 18. The Years are numbered from 1 to 12.
Modular PSUs are also referred to as Full(y) Modular, and semi-modular ones are usually just called Modular. Sometimes you get less cables than your modular PSU can accept, Enermax (for example) love doing this.
An APU is an auxiliary power unit.. On-board APUs are small jet turboshaft engines that are started to provide electrical and hydraulic power to the aircraft when needed during periods when the engines aren't running. Some aircraft are designed so the APU cannot be run unless the aircraft is sitting on the ground (governed by a weight on wheels switch). The entire aircraft can't be run off the APU, but all essential systems can be. By contrast, an EPU is an emergency power unit..