Construction jobsite and contracting business management apparatus and instruments, namely, opto-electric distance and angle measuring apparatus in the nature of machine control systems comprised of display, touchscreen, sensors, receivers, transmitter, accelerometer, control box, gyro, compass, controller, GPS, antennas, connectors, brackets, wireless components, hydraulics and software; electric distance meter, data collector in the nature of handheld instruments in the nature of computers that enable operators to collect precise maps of the jobsite, data calculator, reflector for positioning and stakeout activities at the jobsite and replacement parts thereof, level being a laser and optical measuring device in the nature of a laser level, rotating laser level, auto level, tilting level, tripod, computers, computer programs for compiling land survey data and analyzing the size of real estate for construction preparation, computer software to create geometric models of the construction site and of the work to be performed, computer software to manage the mission planning and mission optimization for the fleet of vehicles operating at the jobsite, a system of radio communication among all vehicles at the jobsite consisting primarily of radio transmitters and receivers to enable file sharing and other types of information among vehicles and with remote vehicles and control rooms, computer software which controls and operates construction machines, namely, excavators, bulldozers, pavers, milling machines, drills, dumpers, skid steer loaders, concrete pavers, road rollers, ready mix trucks, telehandlers, forklifts, crane trucks based on geographical data, three dimensional positioning and grade information read by surveying machines, software and display systems consisting primarily of ruggedized touch screen computer that show the geometry of the local terrain plus the work performed so far by each machine compared with the planned mission for the day

Reflector for lights and replacements parts therefor