It was like holding the future in your little 10 year old hands.

https://en.wikipedia.org/wiki/Mattel_Auto_Race

Mattel Electronics Auto Race was released in 1976 by Mattel Electronics as the first handheld electronic game to use only solid-state electronics; it has no mechanical elements except the controls and on/off switch. Using hardware designed for calculators and powered by a nine-volt battery, the cars are represented by red LEDs on a playfield which covers only a small portion of the case. The audio consists of beeps. George J. Klose based the game on 1970s racing arcade video games and designed the hardware, with some hardware features added by Mark Lesser who also wrote the 512 bytes of program code.

https://www.kickstarter.com/projects/soulscircuit/pilet-opensource-modular-portable-mini-computer?

Something I would definitely not have a need for, but it looks pretty cool. They various types of configurations.

I’ve been into retro futuristic styles for some time and cassette futurism is one of my favs, so I am hoping this sub stays active. I’ve started collecting some things that mimic the style.

https://www.instagram.com/reel/DAspVd-JGqK/

This doesn’t come in the size for my iPhone, but if it did I would splurge on getting it.

Sadly doesn't work anymore as it was dropped and damaged. Found it at an ewaste site with the idea to build an ITX pc inside with a little DIY digital oscilloscope replacing the screen connected to the audio out so you can see the wave form as you listen to music or play games

Z80 CPU, 2.03 MHz. 4kb of ram. No drives, just a cassette player/recorder, which frequently would lose your programs.

Good times.

More info: https://www.trs-80.com/wordpress/models/model-3/

Released in 1984 this stereo radio cassette recorder has speakers which are moveable, removable and act as it's battery compartments.

Pic is a screenshot of a Youtube video by the great Techmoan:

https://www.youtube.com/watch?v=aqc9akDIE_g

Even a Simple Cassette Player is Cassette Futurism.

Source: Flickr

They ruined it.

Source: Tumblr

More:

Source: https://americanhistory.si.edu/collections/object/nmah_1325627

Source: Sheddit