Summary Tape File 1 consists of four sets of computer-readable data files containing detailed tabulations of the nation's population and housing characteristics produced from the 1980 Census. This series is comprised of Summary Tape File 1A (STF1A), Summary Tape File 1B (STF1B), Summary Tape File 1C (STF1C), and Summary Tape File 1D (STF1D). STF1A, STF1B, and STF1D have 52 separate files, one for each state, Puerto Rico, and the District of Columbia. STF1C consists of one nation-wide datafile containing information about all states. All files in the STF1 series are identical, containing 321 substantive data variables organized in the form of 59 ''tables,'' as well as standard geographic identification variables. All of the data items contained in all the STF 1 files were tabulated from the ''complete count'' or ''100%'' questions included on the 1980 Census questionnaire. All four groups of files within the STF1 series have identical record formats and technical characteristics and differ only in the types of geographical areas for which the summarized data items are presented. STF1B contains summaries for state or state equivalent, SMSA, remainder of state (nonSMSA), county or county segment (in New England), MCD (present in only 20 states), place or place segment within county or MCD, remainder of MCD or remainder of county, tract (BNA) or portion of tract (BNA) within place, place segment and remainder of county or MCD: block (or ED). All STF 1 files are being released on a state-by-state ''flow'' basis, with the less populous states generally being prepared and released before the most populous states. Each ''record'' in these files comprises 3,276 characters with two record segments (physical records) of 1,638 characters each, the number of data records in each file varies by state.
Census of Population and Housing, 1980: Summary Tape File 1B, (name of state) [machine-readable data file]. prepared by the Bureau of the Census. Washington: The Bureau [producer and distributor], 1981.
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The codebook for this data is located in the
Data Services Codebook Collection in the Main Reference Room with the IPC
number of 1838 7624D.
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