Title: CITZAF Version 2.03Keywords: Combined ZAF and Phi-Rho-Z Electron Probe Correction Programs Computer: IBM PC, XT, AT, PS2 or compatible Operating System: MS-DOS 2.0 or higher Programming Language: MS Quick BASIC Vers. 3.0 or Borland Turbo BASIC V. 1.0 Hardware Requirements: Math Chip, 8087/287/387 gives faster processing. Author(s): John T. Armstrong Correspondence Address: California Institute of Technology, Div. of Geological and Planetary Sciences 170-25, Pasadena, CA 91125. (818) 356-6126 Abstract: A Data transfer, entry, manipulation and reduction package for determining compositions from electron probe data recorded from conventional thick polished specimens (TPS),this version of the Caltech ZAF program package (V2.03) comprises four self-extracting ZIP files. CITZAF1.EXE contains the BASIC source codes of the various programs and ASCII text files of the data tables of line and edge energies and mass absorption coefficients. Files CIT8086.EXE and CIT8087.EXE contain compiled versions of the BASIC-language ZAF programs for use with standard (8086) PC computers and computers having an 8087 math coprocessor, respectively. Also included in the archives are random access files containing the line and edge energies, mass absorption coefficients, atomic weights and fluorescence yield factors used by the ZAF programs. CITZAF3.EXE contains compiled versions (for 8086 and 8087) of BASIC language programs that store the random access data files, copies of public domain utility programs that are used in this package with their instructions, and a READ.ME document. Included in the package are the thin film and particle analysis versions of the program (CITPTC), both source code and executables.