In addition to the single computer installation licenses noted above, Vertigraph offers concurrent use licenses for SiteWorx/OS and BidScreen XL. A minimum of three concurrent licenses must be purchased to implement this license manager program. Once a minimum of three concurrent use licenses are acquired, the contractor can install the software on as many computers desired at an annual cost of $100 per installation over the number of concurrent licenses acquired. Concurrent use licenses are ideal for larger contractors with multiple offices where the software can be used companywide at a reduced cost. Contact Vertigraph today for further information about this concurrent license manager program.