There are numerous references to "Alice in Wonderland" and "Through the Looking-Glass and What Alice Found There".

The glyphs on the computer screens, with the exception of the call traces, consists of reversed letters, numbers, and Japanese katakana characters.

Trinity's room number is 303 ("trinity" 3). Neo is The One and number of his apartment is 101.

The number of the phone Trinity was using at the beginning of the movie is 555-0690.

Neo's room number is 101. Room 101 was the place in George Orwell's book "1984" where people were sent to be tortured and would end up believing something that wasn't true.

Neo is often referred to as the "One". One is an anagram of Neo.

The date stamp on the phone trace program in the opening sequence reads "2/18/99". The date stamp on the phone trace program in the closing sequence reads "9/18/99". This means that the events in the movie take place over exactly 7 months.

The sequels took so long to finish because several CGI firms went bankrupt while working on rendering the effects for both movies (Matrix Reloaded and Revolutions).

The film's concluding highway chase sequence took 45 days to shoot (longer than many films' entire shooting schedule).

It took four years to render the effects in this movie (Matrix Reloaded) using several companies, a task which would have taken one computer in upwards of 300 years to accomplish.

The 100 Agent Smiths battle alone took two years to complete.

GM donated 300 cars for use in the production of the movie (Matrix Reloaded). All 300 were wrecked by the end.

When Trinity hacks the Power Station's computer, the password she uses is "Z10N0101".

Trinity uses a genuine hack to get into the Matrix. She uses Nmap version 2.54BETA25 (an actual port scanning tool) to find a vulnerable SSH server, and then proceeds to exploit it using the SSH1 CRC32 exploit from 2001.

Morpheus' line, "I had a dream, and now that dream is gone from me," is a quote from King Nebuchadnezzar in the Bible.

In an unprecendented simultaneous global release, this film opened at exactly the same moment in every major city in the world on November 5: 6am in Los Angeles, 9am in New York, 2pm in London, 5pm in Moscow, 11pm in Tokyo, 1am in Sydney and at corresponding times in over 50 additional countries worldwide.

They spent two months designing the apparatus to make the perfect rain drop.

In the scene where Morpheus, Trinity, and Seraph are chasing the Trainman, an advertisement for Tastee Wheat can be seen. Tastee Wheat was mentioned in Matrix, The (1999) when Mouse was trying to describe the food in the real world.

The brand of cigarettes the Oracle smokes is "Double Destiny".

While Trinity is chasing the Trainman in the subway, an advertisement for Powerade can be seen. When Matrix Reloaded, The (2003) was released in theatres, Matrix-based commercials for Powerade aired on US television.

The black cat at the end of the film is the same one in the "deja-vu" scene from "The Matrix". It even meows in the same way.