42 Providing calibration services in the field of machine tool operation for others, namely, related to the operation of CNC (computer numerical control) machine tools, boring machines, lathes, digital readout displays, EDM machines, engine lathes, grinding machines, vertical and horizontal machining centers, metrology equipment, milling machines, presses, saws, tooling, water jet cutting systems, work holding devices, metal cutting tools, metalworking machines and 3D printing machinery; Providing calculation services, namely, providing temporary use of non-downloadable software for calculating algorithms and formulas in the field of machine tool operation for others, namely, related to the operation of CNC (computer numerical control) machine tools, boring machines, lathes, digital readout displays, EDM machines, engine lathes, grinding machines, vertical and horizontal machining centers, metrology equipment, milling machines, presses, saws, tooling, water jet cutting systems, work holding devices, metal cutting tools, metalworking machines and 3D printing machinery; consulting in the field of optimization of the use of machining tools, machinery, and manufacturing equipment, namely, consulting in the field of product research, machine calculations being a type of technological analysis, and software consulting in the field of use of machining tools, machinery and manufacturing equipment; technical support, namely, troubleshooting in the nature of diagnosing computer hardware and software problems in the field of machine tool operation and technical advice related to the software operation of CNC (computer numerical control) machine tools, boring machines, lathes, digital readout displays, EDM machines, engine lathes, grinding machines, vertical and horizontal machining centers, metrology equipment, milling machines, presses, saws, tooling, water jet cutting systems, work holding devices, metal cutting tools, metalworking machines and 3D printing machinery; application software services for mobile devices, namely, providing a mobile platform in the nature of application service provider (ASP) featuring software for obtaining and posting industrial job listings, resumes, and other job search information in the field of machine tool operation