Perihelion Software Ltd, the Shepton Mallet, Somerset-based consultancy and software house that designed the Unix-lookalike parallel operating system, Helios, has designed a Health Management System for Central Nottinghamshire Health Authority, which it hopes will be a blueprint for the other 192 UK National Health Service health authorities: the health system, which is the first step in an information technology programme designed to provide a common pool of patient information throughout Nottinghamshire, is hosted on a DECstation 5000 Series system linked to a mixture of Hewlett-Packard Co and Samsung Electronics Co X-terminals and various personal computers supplied by Cambridge-based Random UK; the Posix-compliant software runs under Unix and incorporates the Oracle database, although Perihelion’s Jack Lang says the company is currently evaluating Ingres; the total system is worth several million pounds, and most of the money was put up by the Wolfson Trust.