Complete Software Services was established in 1987 and specializes in meeting the accounting and system needs of small and medium-sized companies throughout northeastern Illinois.  We sell, support and modify the accounting products of Open Systems, Inc., primarily OPEN SYSTEMS Accounting Software (OSAS).  Complete Software Services is a leader in OSAS modifications and enhancements and has worked with all versions of OSAS.

We also specialize in business computer systems.  Utilizing SCO OpenServer (UNIX) and Microsoft Windows based servers Complete Software Services sells, installs and supports networked and multi-user systems.

Complete Software Services is your single source for business computer system solutions.  We offer servers, workstations, printers and software for your accounting and office automation needs.  We offer sales, service, installation, training and support on all the hardware and software products we sell.  You don’t need to call several different suppliers to get the support you need, Complete Software Services is the only call you need to make.