If you go through the history of alien encounter reports (and people who claimed to have been in alien craft), you'll never read anything about the heads-up displays of our modern aircraft or anything that looks like a graphic display. The interiors of these space craft are always described as levers, lights and dials (dials???), exactly what you'd expect in a science fiction movie at the time of the report. Betty Hill's story of an alien showing her two dimensional "maps" of the stars the aliens travel to was a perfect example of something that made no sense.
The alien suits have a clear pattern. The post World War II space suits were closer to diving suits. Once we saw our astronauts wearing silvery space suits with bubble helmets, the aliens copied our fashion and reports of aliens wearing similar suits became common. Eventually aliens without any suits became the most common.
You'll never read a report of an alien carrying a conveniently-sized device like an iPod or a cell phone. Most aliens had bulky devices with knobs and switches (one report did have a device with a round television screen). One alien device commonly reported in the 60's was a "magic wand" which was used to immobilize people or zap them with thunderbolts if they were threatening. This was also straight out of earthly fiction.