Sensor Pod Upgrade
As of the Third Tiberium War the GDI tech centers provide Zone Troopers, Sonic emitters, Ion Cannon Control Centers, Juggernauts, Firehawks, Space Command Uplink centers, Mammoth Tanks, and with the conjunction of the Armory, Commandos. GDI also used it as a place to organize and call in Sharpshooter teams, save for Steel Talons division, which placed less emphases on infantry. GDI tech center design follow the design of previous Upgrade center in which most upgrade acquired also add upgrade to the building.
Another new concept introduced for technology centers during the Third Tibeirum War was supporting "low tech" units with newer technology. Mortar, Railgun, and Tungsten AA shells upgrades were made available from the centers, though ZOCOM didn't implement Railguns. Steel Talons also employed the Adaptive armour upgrade from the technology center.
Nod became dissatisfied with centers that were geared for only providing current technology and began replacing their technology centers with the research-oriented technology labs before the Third Tiberium War. It is probably not a coincidence that they look suspiciously like Scrin's Technology Assembler, which serve as the aliens' own technology centers.