High-level languages are designed independent of a specific computing system architecture. There are four well-known ways to represent signed numbers in a binary computing system. Cisco partners can offer cloud-based services based on Cisco's virtualized Unified Computing System (UCS). Only the last component in the chain directly connects to the computing system. In 2000, LexisNexis also launched HPCC Systems, its data-intensive computing system platform. The Tektronix 4051 Graphics Computing System was introduced in October 1975. A navigation system is a computing system that aids in navigation. National Instruments have developed a hybrid embedded computing system called CompactRIO. To implement these goals, MIT decided to build a Unix-based distributed computing system. The fastest grid computing system is the distributed computing project Folding@home (F@h). DCE/RPC was derived from the "Network Computing System" (NCS) created at Apollo Computer. On May 25, 2011 Lockheed Martin bought the first Quantum Computing System from D-Wave Systems.