January 29, 1992 1990 Census of Population and Housing Block Statistics Summary Tape File 1B Extract ------------------------------ Using The CD-ROM ------------------------------ The 1990 Summary Tape File 1B software was designed to run on a personal computer with 640K RAM operating under MS-DOS 3.0 or higher. There are no special display requirements. The CD-ROM is in the ISO 9660 format which requires the use of Microsoft CD-ROM Extensions Version 2.0 or higher. For direct access to the data files, one of the many software packages which recognize the dBASE III Plus (.DBF) format will be very useful. Users of other types of systems, such as the Apple Macintosh, have access to the files through support for ISO 9660 CD-ROMs. Please note that the retrieval software will only run in the MS-DOS environment. Type GO at the DOS prompt and ENTER. Example: L:\>go ------------------------------ Contents Of The CD-ROM ------------------------------ Volume in drive is CD90_1B DOCUMENT Directory for documentation files. These are ASCII text files which contain the complete technical documentation for the data. GO.BAT Batch file to execute data retrieval software. STF1B.EXE Data retrieval software. STF1BXss.DBF Statistical database file for each State. is the State abbreviation. STF1BZss.DBF Zero population and housing file for each State. is the State abbreviation. Reference Files STF1STRU.DBF This file describes the structure of the first 67 fields in the statistical database file. These are the identification fields. TABLES.DBF This file describes the numeric data tables. CNAMESss.DBF This file lists county names and FIPS codes for State . Index Files CNAMESss.NDX This is a dBASE III index file for CNAMESss.DBF. Key field is ANPSADPI. STF1BMss.NDX This is a dBASE III index file for STF1BXss.DBF. Key fields are SUMLEV + CNTY + COUSUBFP + PLACEFP + TRACTBNA + BLCKGR. STF1BPss.NDX This is a dBASE III index file for STF1BXss.DBF. Key fields are SUMLEV +PLACEFP. STF1BTss.NDX This is a dBASE III index file for STF1BXss.DBF. Key fields are SUMLEV + CNTY + TRACTBNA + BLCKGR. STF1BLss.NDX This is a dBASE III index file for STF1BXss.DBF. Key fields are SUMLEV + left(ANPSADPI,1). This index is UNIQUE. STF1BZss.NDX This is a dBASE III index file for STF1BZss.DBF. Key fields are SUMLEV + CNTY + COUSUBFP + PLACEFP + TRACTBNA + BLCKGR. TABLES.NDX This is a dBASE III index file for TABLES.DBF. Key fields are TABLE + FIELD. ------------------------------