This is the document of an assigned speech delivered in the Katsurahama Conference of Clinical Pathology (in Kochi, 1989) which was presided by Prof. Masahide Sasaki of Kochi Medical School. The speaker emphasizes the importance of arrangement of laboratory tests to be carried out in sets and facilitation of clinical diagnosis by use of a computer which enables the diagnostic interpretation of test results (CALD: computer-assisted laboratory diagnosis). The laboratory will be able to make a service by CALD to the extent that possible disease groups relevant to each patient are mentioned on a report sheet