The system, maintained by the airport operator Delhi International Airport Limited (DIAL), was restored at around 9.40am, a senior airline official said.
Due to the glitch, the airlines had to under taken manual operations, he said, adding that the airlines and passengers faced problems in boarding aircraft. The visual ground display system (VGDS), which helps aircraft dock at the boarding gates and marks the baggage to the designated baggage belt, was also not operational, airport sources said.
A DIAL spokesperson said, "A technical glitch was observed at T3 at 8.20am which was fully restored at 9.40am. This led to some interruption in passenger processing and information display services. All systems are fully functional now."
However, airline officials claimed though it was restored, it was functioning "erratically". The computer problem had occurred just after the peak hour departure rush.