ifications ▁are ▁compar able ▁to ▁a ▁high - class ▁university ▁degree ▁and ▁officially ▁acc red ited ▁by ▁the ▁Bav arian ▁Department ▁of ▁Education . ▁ ▁Dr um mer ' s ▁focus ▁runs ▁over ▁ 1 2 0 0 ▁teaching ▁units ▁per ▁week . ▁ ▁S ources ▁▁ ▁: de : D rum mers ▁F ocus ▁ ▁External ▁links ▁▁ ▁home page ▁of ▁drum mer ' s ▁focus ▁( in ▁German ) ▁ ▁st icks ▁magazine ▁( in ▁German ) ▁ ▁Category : Music ▁schools ▁in ▁Germany <0x0A> </s> ▁In ▁computer ▁languages , ▁ident ifiers ▁are ▁tokens ▁( also ▁called ▁symbols ) ▁which ▁name ▁language ▁entities . ▁Some ▁of ▁the ▁kinds ▁of ▁entities ▁an ▁identifier ▁might ▁denote ▁include ▁variables , ▁types , ▁labels , ▁sub rout ines , ▁ ▁and ▁packages . ▁ ▁Which ▁character ▁sequences ▁const itute ▁ident ifiers ▁depends ▁on ▁the ▁lex ical ▁grammar ▁of ▁the ▁language . ▁A ▁common ▁rule ▁is ▁al phan umeric ▁sequences , ▁with ▁unders core ▁also ▁allowed , ▁and ▁with ▁the ▁condition ▁that ▁it ▁not ▁begin ▁with ▁a ▁digit ▁( to ▁simplify ▁lex ing ▁by ▁avoid ing ▁confusing ▁with ▁integer ▁liter als ) ▁– ▁so ▁foo , ▁foo 1 , ▁foo _ bar , ▁_ foo ▁are ▁allowed , ▁but ▁ 1 foo ▁is ▁not ▁– ▁this ▁is ▁the ▁definition ▁used ▁in ▁earlier ▁versions ▁of ▁C ▁and ▁C ++, ▁Python , ▁and ▁many ▁other ▁languages . ▁Later ▁versions ▁of ▁these ▁languages , ▁along ▁with ▁many ▁other ▁modern ▁languages , ▁support ▁many ▁more ▁Unicode ▁characters ▁in ▁an ▁identifier