At today's Let's talk iPhone event, Apple VP Phil Shiller announced Siri, an advanced voice-activated control system included with the new iPhone 4S. Even though this is an exciting step forward, computers have had speech recognition for years, and movies and television have simulated it for even longer. Here are some examples of fictional computers in movies that could hold a conversation:

2001 [videodisc]: a space odyssey by Metro-Goldwyn- Mayer

The time machine [videodisc] by DreamWorks Pictures and Warner Bros. Pictures present a Parkes/MacDonald production

The Terminator [videodisc] by Hemdale presents a Pacific Western production of a James Cameron film; Cinema '84; a Greenberg Brothers Partnership

Alchemy [videodisc] presented by Black Sand Pictures and Enlightenment Productions; producer, Kenneth Schapiro; written and directed by Evan Oppenheimer

A.I. Artificial intelligence [videodisc] by Dreamworks Pictures and Warner Bros. Pictures present an Amblin/ Stanley Kubrick production, a film by Steven Spielberg

I, robot [videodisc] by 20th Century Fox; Davis Entertainment; Laurence Mark Productions; Canlaws Productions; Mediastream Vierte Film GmbH & Co. Vermarktungs KG; Overbrook Entertainment

Iron Man [videodisc] by Paramount Pictures present a Marvel Studios production in association with Fairview Entertainment

Star trek. Season one, Disc 1 [videodisc] by Desilu Productions