The mug shot of Edward lists his number as 208241138. If you assign the numbers to letters of the alphabet, you get 20=T, 8=H, and 24=X. THX-1138
The homework assignment on the blackboard is the same as Indiana Jones assigns in Raiders of the Lost Ark - Michaelson, chapters 4 and 5.
Part way though, Dr. Adam Lindquist seems to be replaced by another interviewee at the same location. The newspaper clipping immediately preceding her first appearance shows that a certain Barbara Lindquist and her six year old son Adam were killed in the car crash.
One of the technical drawings in the main character's notebook is the Tardis center console from the time travel themed series Doctor Who (1963).
After the Soviets steal the prototype, the Presidential photograph behind the general has now changed from Obama to Hillary Clinton. In the next shot, there's a newspaper in the background whose headline says, "Nixon Killed." The paper is from Dallas, where JFK was assassinated in 1963, indicating it was Nixon who won the 1960 election in this timeline.