Answer: encs

AnswerCrossword Clue
ENCSLetter attachments: Abbr.
ENCSThey're inserted into envs.
ENCSEnv. extras
ENCSEnclosures: Abbr.
ENCSRef. books.
ENCSLetter inserts: Abbr.
ENCSEnvelope additions: Abbr.
ENCSBusiness abbrs.
ENCSRef. books
ENCSRef. works
ENCSThey accompany letters: Abbr.
ENCSLtr. extras
ENCSAbbr. at the bottom of a business letter
ENCSAccompaniers of cover letters: Abbr.
ENCSEnv. additions
ENCSSASEs, for instance
ENCSEnv. add-ins
ENCSBusiness ltr. add-ins
ENCSBus. letter add-ins
ENCSExtra things in the env.
ENCSEnv. stuffers
ENCSEnv. fillers
ENCSLtr. go-withs
ENCSThey may fill a 57D
ENCSSome refs.
ENCSSASEs, e.g.
ENCSLtr. attachments
ENCSPapers inside pkgs.
ENCSLetter-bottom abbr.
ENCSEnv. contents
ENCSLtr.-bottom notation
ENCSItems incl. with a letter
ENCSItems included in envs.
ENCSLtr. add-ins
ENCSEnv. insertions
ENCSLtr. additions
ENCSContents of some envs.
ENCSExtras in an env.