encls SASEs, e.g What SASEs are Things with ltrs S.A.S.E.'s, e.g Pens: Abbr Env. contents besides letters Docs. sent with the letter Ltr. accompaniers Cover ltr. accompaniers Bus. cards in commercial mailings, e.g. S.A.S.E.'s, e.g. Bottom-of-letter abbr. Bus. cards in commercial mailings, e.g