UTF-8の呼び方

環境	UTF-8 BOMなし	UTF-8 BOMあり
秀丸	UTF-8	UTF-8 (BOMあり)
TeraTerm	UTF-8	UTF-8m
Peggy	UTF-8N	UTF-8
メモ帳	？	UTF-8
charset	UTF-8	？
LANG	ja_JP.UTF-8	？

とりあえず、「UTF-8 BOMなし」が標準。