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Abbr. at the bottom of a business letter, 4 letters

Accompaniers of cover letters: Abbr., 4 letters

Business ltr. add-ins, 4 letters

Env. add-ins, 4 letters

Env. additions, 4 letters

Env. contents, 4 letters

Env. extras, 4 letters

Env. fillers, 4 letters

Envelope extras: Abbr., 4 letters

Extra things in the env., 4 letters

Items incl. with a letter, 4 letters

Items included in envs., 4 letters

Letter attachments: Abbr., 4 letters

Letter-bottom abbr., 4 letters

Ltr. add-ins, 4 letters

Ltr. additions, 4 letters

Ltr. attachments, 4 letters

Ltr. extras, 4 letters

Ltr.-bottom notation, 4 letters

Ref. books, 4 letters

SASEs, e.g., 4 letters

SASEs, for instance, 4 letters

SASEs, perhaps, 4 letters

Some refs., 4 letters

They accompany letters: Abbr., 4 letters

They're inserted into envs., 4 letters

Writing samples with a c.v., perhaps: Abbr., 4 letters

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