boot mail
n.— «Raytheon Company has demonstrated that a new personal computer application, the PDA 184, eliminates the need for deployed troops to download e-mail files to a disc and hand-carry them from one type of military radio to another. The practice, called “boot mail,” is a work-around that troops employ to overcome interoperability problems among ultra high frequency (UHF) radios that deliver their e-mail to the field.» —“Raytheon Enlists PDA 184 to Stamp Out ‘Boot Mail’” in Fort Wayne, Ind. PR Newswire Nov. 28, 2005. (source: Double-Tongued Dictionary)