I was in IOBC. So, we got to carry whatever big knife we cared to. I usually had a Gerber MkII, or the Glock field knife, which was just slim enough to wear upside down on the left field gear suspender. Since it had a locking sheath I never worried about losing it. The Gerbers, tho, would poke you in the ribs all the time, plus tying one down made that leg hot for lack of air circulation.
Let's see, flipping thru my Knives annuals, '84 - '89, hmmm. Had a Tekna boot, later sold it but still have the velcro straps with spring loaded buckles for skin diving. Cold Steel had the Urban Skinner and some kind of new plastic stuff for sheaths called kydex. Normark made folders. Benchmark , the SOS or Moray. Frank Vought "Outfitter" knives got some recognition. Kershaw had the rubber handled Task Force folders. Calmont came out with a deer knife. Leatherman was introduced. Coleman bought Western and made it disappear. Remington came out with their own, still have the shotgun folder with a choke wrench. SOG, Muela, and Aitor appeared, along with Outdoor Edge and some new sharpener called DMT, with diamonds on perforated steel molded to a handle.
I bought a Queen button lock folder, weird because it was nearly squared off vs the older ones I had seen. Pretty much used a Gerber LST for use every day, before we even knew what Every Day Carry meant. I heard about Terzuola and he made a bigger impact on the market than maybe we give him credit for - it was the first ruggedized folder you couldn't break, with some weird industrial glass filled handle material. Later that inside locking strip from Walker got married to it and somebody starting making a tanto bladed liner lock knife with G10 handles he called the CQC7, and then some other company started making a nice copy in volume, which made me spend the most I ever had on a knife - $96. I quickly discovered the teflon coating wasn't all that, but I still have it - A Benchmade Emerson CQC7. But that was the 90's.
The 80's. Sure didn't remember, I had to look in the books. What I remember most was that nobody made a tactical knife, we didn't even know they were called that or what they looked like. We sure knew what it was when we saw one, though.