The first automatically encoded email attachment was sent over 20 years ago, on March 11, 1992, by then Bellcore researcher Nathaniel Borenstein, using what would become the Multipurpose Internet Mail Extensions (MIME) protocol. It was 406 KB, or thereabouts, assuming the .wav file posted on Borenstein's website is unaltered. Since then, files have put on weight. Graphics files, music files and video files today are routinely measured in tens or hundreds of megabytes, even gigabytes. Read the full story at Information Week.