tar and feather

[from UNIX `tar(1)'] vt. To create a transportable archive from a group of files by first sticking them together with `tar(1)' (the Tape ARchiver) and then compressing the result (see compress). The latter action is dubbed `feathering' by analogy to what you do with an airplane propeller to decrease wind resistance, or with an oar to reduce water resistance; smaller files, after all, slip through comm links more easily.