About the Texas Common Course Numbering System (TCCNS)
Course Naming Standard
All TCCNS courses are identified by a four character course prefix representing the course type or academic discipline, followed by a four digit course number.
The first digit of the course number denotes the academic level of the course. The second digit represents the credit value of the course in semester hours. The third and fourth digits establish course sequencing and/or distinguish the course from others of the same level, credit value, and prefix.
All prefix/number combinations correspond to the course descriptions listed in the Academic Course Guide Manual (ACGM), published by the Texas Higher Education Coordinating Board. The ACGM is the official list of courses for which state funding is provided to community colleges; in effect, the ACGM comprises the academic (in contrast to occupational/technical) courses Texas public community colleges may offer without obtaining special permission from the Coordinating Board.