I am not proposing to make an incompatible method. I am proposing to make one that: 1. Is more likely than any other to actually achieve true compatibility. 2. Extends further the data compactions of other methods. PRINT, PUNCH, DISK, CARD, and NETDATA never achieved this, and I doubt they every will completely do this. I never heard of RMSG. RFC822 is not a file transmission method, although with a special extra layer in between, any of the above can be put inside RFC822.