You won’t be the first to choose OSAS. Over 200,000 companies have made the same choice.

OPEN SYSTEMS® Accounting Software (OSAS®) is a powerful, award-winning accounting and business management system that is flexible and easy to customize to your requirements. Built on a tradition of success, OSAS is designed to be easy to learn and use. A proven industry leader, OSAS will help meet your needs and expectations now and in the future.

OSAS provides these key advantages

Robust Functionality - We have over 25 years of experience in providing award-winning business solutions and incorporating feedback from real-world users.

Open Source Code - We provide source code for our applications at no additional cost. We do this to protect your investment in our technology, as well as encourage customization that will support your unique needs and changing market conditions.

Availability & Strong Support - Several hundred authorized value added resellers sell, support and customize Open Systems products. Many vertical applications are also available from OSAS developers.

Platform Portability - With OSAS, you can choose the platform that suits your business: Windows, UNIX/Solaris/AIX, or Linux. In addition, OSAS C/S is a high performance, cost-effective client/server solution that provides additional platform flexibility and scalability.

Interface Flexibility - some users prefer character-based screens; others may want to use graphical screens. Have it your way! OSAS allows you to mix and match screens in the same accounting system.

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