DOLINK is a program we developed to help manage our genetic data, particularly for linkage analyses. The user can use any database with which they are familiar, and then export the data to DOLINK which can then process it into a variety of different for formats for LINKAGE, ESPA, CRIMAP or KIN. Examples are also given of how the data can be exported directly from a database to programs such as SIMLINK, POINTER and PEDRAW. Special features of DOLINK include: ability to target DOS or Unix; runs either interactively or in batch mode; alleles can be checked for compatibility; alleles can be coded using numeric and/or factor union notation; genotypes can be recoded to use fewer alleles with minimal loss of information; affection loci, quantitative loci, sex-linkage, liability classes and pedigree loops are all handled correctly. Other utilities are also provided to post-process LINKAGE output to produce graphs of lod scores, and to provide input to HOMOG, BTEST and FASTMAP. It is provided with example database files which work with two shareware databases, PC-File and File Express. PC-File is only shareware in USA, Canada, Australia and New Zealand and would have to be obtained separately. However shareware copies of File Express are widely available and should be available at the DOLINK sites, in files FE51-(A,B and C).ZIP.