Back when I went to high school (1987-1991), I took BASIC computer programming in my freshman year, and then when Windows '95 came out several years after I had graduated, BASIC would eventually become obsolete and a "technological fossil", so to speak, as computer techonology became more advanced.....
To the best of my knowledge, they no longer manufacture 3 1/2" or 5 1/4" floppy disks, and many computers nowadays use CD-Rom drives and/or USB peripheral ports.
They still make disposable 35mm film cameras, but that's apparently being phased out little by little as the camera industry is making the transition to digital film.
It seems like the only place you can find music cassette albums is at a garage/yard sale, thrift store, flea markets, etc., yet they still manufacture blank cassettes for recording on a small scale. Meanwhile, CD music is still readily available, and even nowadays, many teenagers apparently have some sort of portable MP3 player close at hand.
Even cell phones have changed over the years. At first, it looked like a big bulky handset, and even then, you could only make local calls. Nowadays, they have all sorts of newfangled "smartphones", such as Android, Blackberry, iPhone, etc.
Back when I went to school mostly during the '80s until I graduated in 1991, I had to use pencil and paper to write my lessons down. The "modern" computer era was still a few years ahead, with Windows 95 the first practical OS (of course, some people use Apple Mac computers), and none of the computers that I used back then had internet browsers.
Back in the 1970's, most people watched TV with an aerial rooftop antenna, and/or the old-fashioned inside antennas, such as the "rabbit ears" or "bowtie" variety. Nowadays, cable and satellite TV services are almost everywhere, yet some local cable providers might offer a limited range of channels in smaller areas.