The Time Machine-Rod Taylor,The War Of The Worlds(1953),The Thing From Another World,Them!,Tarantula,The original Japanese Godzilla movies,The Invasion Of The Body Snatchers(50's and '78(featuring Nimoy) versions ),Outland,Silent Running,Flash Gordon,Zardoz,The Man Who Fell To Eaeth,Metropolis(1927),Slaughterhouse Five to name but a few.

Tarantula - Is that the one where they lower the big electrodes down the mine shaft ? Been a while on that one

I don’t know why - I love the spinning rings scene in The Time Machine

incredible Shrinking Man - Grant Williams 1952
Mysterious Island - 1961
Dimension 5 - Jeffrey Hunter 1966
Teenagers From Outer Space 1959. ( disintegration guns were cool)

The ORIGINAL "The Day The Earth Stood Still". The remake with Keanu was an abomination.

Yeah the remake was a CGI crapfest

"The Giant Claw", "Village Of The Giants", "2001: A Space Oddessy", "2010: The Year We Make Contact".

"Colossus: The Forbin Project (1970)"

Excerpt from the “IMDb” description:

“Thinking this will prevent war, the US government gives an impenetrable supercomputer total control over launching nuclear missiles.”

Someone from the Board of the TV show, “Person of Interest” (2011-2016), recommended this movie. I'm such a fan of that show; so, I decided to check out this movie. Definitely has not worn well tech-wise. But, considering the world’s ongoing quest to perfect AI, the BeCarefulWhatYouWishFor message still resonates.

"Classic"is the keyword here the poster asked for SF movies pre 1990's 😉

Red Planet was from 2000 and the remake Solaris is from 2002 ,the Tarkovski version from 1972,and since we are on the subject of Tarkovski Stalker can also be put on the list.And one wasn't adressing you specifically but in general that the movies should be from prior to 1990.The Blob starring Steve Mc Queen and the 1988 remake can also be put on that list together with The Last Starfighter,Starman,Soylent Green,The Omega Man,Logan's Run,The Handmaids Tale(the Schlondorff movie) is from 1990,Fantastic Voyage,Capricorn One,XTRO,The Green Slime,Planet Of The Apes,Beneath The Planet Of The Apes,Escape From The Planet Of The Apes,The Conquest Of The Planet Of The Apes,The Battle For The Planet Of The Apes and Master Of The World featuring Vincent Price.

@Nexus71 said:

"Classic"is the keyword here the poster asked for SF movies pre 1990's 😉

oops. I thought you were addressing Formerly

I saw "Colossus" back in the early 70's . I've been thinking about revisiting some of these movies and look at them with fresh eyes.

I've never seen Master of the World.......and I like Vincent price.

I wasn' t talking about that movie I was talking about the 2011-2016 series.

It's quite decent just think 20,000 Leagues Under The Sea but with an airship.Price plays a Nemo like character.

Five Million Years To Earth (aka Quatermass And The Pit, movie version)

Journey To The Far Side Of The Sun (entertaining, but doesn't make sense if you think about it)

There were two novel sequels to Colossus (The Fall Of Colossus, Colossus And The Crab) and one sequel to When Worlds Collide (After Worlds Collide) that were never made into movies but were quite enjoyable. The perhaps oddest thing about the end of the Worlds Collide movie is there are some obviously-constructed things they see on the new world, but nobody says anything about it.

After getting actual experience with computers in the 70s, I had a hard time taking Colossus seriously because they had all that break-down-able stuff inside a mountain that nobody could get at to repair.

cool I'll check it out.

As a kid I always wished they would do movies on the Edgar Rice Boroughs Mars series precisely because they had airships. I thought airships were the coolest concept.

@Knixon

I'll look for After Worlds Collide

I still have my early collection of Sci-Fi paperbacks. I can add it if it's still findable