You should start by adopting metric in anything remotely scientific. Like

• voltage ✔️
• current ✔️
• power ❗ - horses are no longer really relevant, not to mention this - at least appliances use watts
• pressure ❌ - we got lucky that 10⁵ pascals is around 1 atmosphere so use Pa or bar, not mmHg or PSI
  • BTW, PSI is a dumpster fire of an abbreviation, the correct one is lbf/in²
• force ❌ - the lb/lbf confusion is not worth it when we have newtons
• energy ❗ - joules and watt-hours are both fine, calories, electronvolts and TNT-tons less so, but don't use BTU which nobody can really comprehend, or gasoline-gallon-equivalents that nobody knows how to translate to anything else
• gun caliber ✔️
• engine volume ☑ (it's cm³ or ml, not cc FFS)
  • strange that motorcycle and gun enthusiasts are the few users of metric length & volume measurement in the US - too bad that these two measurements are never really used in calculations or conversion
• torque ❌ - this post says Lb-Ft which is wrong on so many levels
• data ✔️ - OK but data rates should be abbreviated MB/s or kb/s, not kbps, Kb/s, kbit/s or Mbit
• wire diameter ❌❌ - holy shit, AWG is such a mess - larger wire is smaller number and the formula is so insane that people use lookup tables, also you're afraid of decimal or negative numbers so large wires are 00, 000 etc.

Can you imagine having different units across the world for voltage or data? Like a 2¾-lemon battery or a 2 million floppy hard drive. That would be absolutely insane.

There is an awful lot of inconsistency in the imperial system too, like pound being abbreviated lb, P (in PSI) or even £, or miles being mi or M in MPH