Before revision: For example, the x86 instruction set architecture has 8 general purpose registers, x86-64 has 16, many RISCs have 32, and IA-64 has 128.
After revision: For example, the IA-32 instruction set architecture has 8 general purpose registers, x86-64 has 16, many RISCs have 32, and IA-64 has 128.