A trend that states that as transistors become smaller, their power density stays the same.
An acronym for Instruction Set Architecture.
A well-defined hardware/software interface that consists of a **functional definition** of operations, modes, and storage locations supported by hardware, and a **precise description** of how to invoke and access them. [Further reading.](https://www.cis.upenn.edu/~milom/cis501-Fall05/lectures/02_isa.pdf)
A trend that states that the number of transistors doubles every 18 months.
The way that an Instruction Set Architecture is implemented on a processor.