OPEL SYSTEMS AND CONSULTANTS Pvt. Ltd. (OSAC) is a leading service oriented company offering optimised business solutions to our clients. With an expertise in the domain area of Payroll and associated services, we are leaders in this segment of application software with PaySoft having an installation base of 500 plus companies and a vast network of sales and support centers in India. We continue to maintain this lead and are continuously innovating and updating latest statutory and other areas of the product.