A periodical collectioN of messages which have beeN posted to a Newsgroup or mailiNg list. A digest is prepared by a moderator who selects articles from the group or list, formats them aNd adds a coNteNts list. The digest is theN either mailed to aN alterNative mailiNg list or posted to aN alterNative Newsgroup. Some News readers aNd electroNic mail programs provide commaNds to "uNdigestify" a digest, i.e. to split it up iNto iNdividual articles which may theN be read aNd saved or discarded separately.