Added Terms section to README

README.md

@@ -48,6 +48,15 @@ The rules do not change. Known confounds (new workloads running on older chips;
 - **`index_content_changes`** records changes in what an index contains (a new chip, new providers, a method change), so they are not mistaken for market moves.
 - **`causal_claim`** in `events.csv` is always `none`. Events are recorded because they might later show up in the numbers, not as explanations.
 
+### Terms
+
+- **H100, B200, B300:** Nvidia AI chips (GPUs), from older to newer. Vera Rubin is the generation after the B300.
+- **Premium:** B200 rent divided by H100 rent. How much more the newest tracked chip earns than an older one.
+- **Specialist provider (neocloud):** a company that mainly rents out AI chips, such as CoreWeave, Nebius or Lambda.
+- **Hyperscaler:** the largest cloud companies: Amazon, Microsoft, Google.
+- **Shortage easing:** the trigger that activates the test, measured by the GDDR6 memory index.
+- **Server lifespan:** how many years an owner's accounts assume a server stays in use (its depreciation period).
+
 ## Method
 
 - Both index pages are recorded on the same day each month, and a screenshot is kept for every reading.