The Defense Information Systems Agency (DISA), Defense Information Technology Contracting Organization (DITCO), Contracting Division (DITCO/PL833), 1 Overcash Avenue, Chambersburg, PA 17201-4123, intends to issue a sole source award to Velocity Software Inc., to provide Velocity zTune Software License and Maintenance for annual period to support DISA ESD. The Velocity zTune Software License/Maintenance is only available from one sole provider. The Velocity zTune software is proprietary to Velocity Software Inc. A sole source letter has been received by the Original Equipment Manufacturer, Velocity Software Inc., stating such. The resultant contract will be firm fixed price.  The applicable NAICS is 511210. All responsible sources may submit a capability statement, proposal, or quotation, which may be considered by the agency.