RAM Random Access Memory
The computer's short-term memory — fast, volatile, holding everything that's running right now.
Turn off the computer and everything in RAM is gone. That's why you save files to SSD (long-term storage). More RAM = more or larger apps at once without the machine getting sweaty.
Typical computer in 2026: 16–32 GB. AI developers want 64–128 GB. Data-centre servers have TBs.