bsed is a program that I wrote early in my career, at AT&T Teletype. It can do simple edits in binary files from the command line or a shell script. It has come in handy many times and I thought it might be of use to other people as well so while I was releasing other tools I decided to release this one as well. It is available under the Lucent Public License.
If you have any comments or suggestions, send me email.