ALFRED® allows you to retrieve vintage versions of economic data that were available on specific dates in history. In general, economic data for past observation periods are revised as more accurate estimates become available. As a result, previous vintages of data can be superseded and may no longer be available from various data sources. Vintage or real time economic data allows academics to reproduce others' research, build more accurate forecasting models, and analyze economic policy decisions using the data available at the time.

This guide is part of the Machine Identification Code Technology project. It explains how to read the date, time, and printer serial number from forensic tracking codes in a Xerox DocuColor color laser printout. This information is the result of research

The Center for Land Use Interpretation's Land Use Database is an on-line computer database of unusual and exemplary sites throughout the United States. It is a free public resource, designed to educate and inform the public about the function and form of

MedlinePlus will direct you to information to help answer health questions. MedlinePlus brings together authoritative information from NLM, the National Institutes of Health (NIH), and other government agencies and health-related organizations. Preformula

Through research, advocacy, and public education, the FAS Project on Government Secrecy works to challenge excessive government secrecy and to promote public oversight.

GovTrack.us is a nexus of information about the United States Congress, following the status of federal legislation and the activities of your senators and representatives.