Commandant Lingov's personal PDA. Contains information about collaboration with mercenaries, among other things.
― In-game description
Lingov's PDA is a mission item in S.T.A.L.K.E.R.: Clear Sky.
Description[]
This PDA can be retrieved from Lingov's body in the Abandoned pig farm in the Dark Valley during the mission Find the commandant. It must be taken back to Chekhov to complete the mission.