All monitors display inch-high letters.
All computers are connected. You can access the information on the villain's desktop computer, even if it's turned off.
A hacker can get into the most sensitive computer in the world before intermission and guess the secret password in two tries.
Word processors never display a cursor.
Complex calculations and loading of huge amounts of data will be accomplished in under three seconds. Movie modems usually appear to transmit data at the speed of two gigabytes per second.
You never have to use the space-bar when typing long sentences.
Movie character never make typing mistakes.
High-tech computers, such as those used by NASA, the CIA, or some such governmental institution, will have easy to understand graphical interfaces.
Those that don't, have incredibly powerful text-bases command shells that can correctly understand and execute commands typed in plain English.
Corollary: you can gain access to any information you want by simply typing
"ACCESS ALL OF THE SECRET FILES" on any keyboard
Likewise, you can infect a computer with a destructive virus by simply typing "UPLOAD VIRUS" (see "Fortress")
Powerful computers beep whenever you press a key or whenever the screen changes. Some computers also slow down the output on the screen so that it
doesn't go faster than you can read. The *really* advanced ones also emulate the sound of a dot-matrix printer.
All computer panels have thousands of volts and flash pots just underneath
the surface. Malfunctions are indicated by a bright flash, a puff of smoke,
a shower of sparks, and an explosion that forces you backwards.
People typing away on a computer will turn it off without saving the data.
Any PERMISSION DENIED has an OVERRIDE function (see "Demolition Man" and
countless others).
When the power plant/missile site/whatever overheats, all the control panels will explode, as will the entire building.
If you display a file on the screen and someone deletes the file, it also
disappears from the screen (e.g. Clear and Present Danger).
If a disk has got encrypted files, you are automatically asked for a
password when you try to access it.
No matter what kind of computer disk it is, it'll be readable by any system
you put it into. All application software is usable by all computer
platforms.
The more high-tech the equipment, the more buttons it has (Aliens). However, everyone must have been highly trained, because the buttons aren't labeled.
Most computers, no matter how small, have reality-defying three-dimensional, active animation, photo-realistic graphics capability.
Laptops, for some strange reason, always seem to have amazing real-time
video phone capabilities and the performance of a CRAY Supercomputer.
Whenever a character looks at a VDU, the image is so bright that it projects itself onto his/her face (see "Alien", "2001").