Present
classification: Suggested:
FU, I, IA, IB, INA, INB, I, TT, TTc, TTw, HAeBe
INT, IT, IN(YY), IS, ISA,
Remark: I is for irregulars
with
ISB doubts about their being young,
TTc
for classical and TTw, for
weak-lined
T Tauri stars, HAeBe for Herbig Ae/Be stars
GCAS, BE Be
RCB RCB
RS Move to rotating variables
SDOR SDor
UV, UVN UV