Unisys Corp., a Blue Bell computer services company, canceled an unsuccessful April attempt to exchange existing debt for new notes and a small amount of cash and made a new, sweetened proposal to creditors holding $1.06 billion of notes.

Unisys Corp., a Blue Bell computer services company, canceled an unsuccessful April attempt to exchange existing debt for new notes and a small amount of cash and made a new, sweetened proposal to creditors holding $1.06 billion of notes.