README.TXT The enclosed disk contains 27 files, which are readable using MS-Word 6 for Windows 3.11 . The file SUPMAT.DOC is explanatory. The remaining 26 files are tables, in which all the analysed ro-vibrational transition wavenumbers of six isotopomers of BrCN are listed. Each table contains the frequency data of a single ro-vibrational band. All the reported measurements are original.