We (Moritz Law Library) subscribe to receive microfiche from the Congressional Information Service (CIS). What is the stuff we receive? All kinds of federal legislative material. (Cleveland-Marshall's law library has created a handy guide on the topic.)
You can find this material online through ProQuest Congressional (because CIS is part of ProQuest, a private company), but sometimes the fiche might be more useful or convenient. To search our fiche collection, just search the index here. To get help with the fiche reader, check with the reference desk or ask for assistance at the circulation desk.