Shadow Genesis has this system from the first release and AFAIK I think we were first

. We have Main Beam for the biggest cannons, Prim. Beam [Primary Beam] for other heavy beams, but not main, like triple Boreas' spinal beams, and Sec. Beam [Secondary Beam] for secondary ones. Anti-air weapons are divided into many other categories. The problem with this is custom turret setup, like in The Game of TAG. Where the Warspite has 2 AAAh or something else, this turrets will remain as "Main Beam"s even after we change the weapon in FRED, so it deprive us very important balancing tool. While I personaly find it ridiculous [imagine Hecate with her big beam dishes equipped with SGreen for example], many FREDers use this. Proper made system may require attention of some coders.