IA

IA or ia may mean:

• Saint Ia, the martyr of Persia in the 4th century
• Interlingua (ISO 639 alpha-2, 'ia)
• Iowa (U. S. postal abbreviation)
• Intel Architecture – Intel's microprocessor designs.
  • IA-4 (the founding of microprocessors)
  • IA-8 (most popular microcomputer CPUs of the 70s)
  • IA-16 (CISC architecture that established the x86 CPUs)
  • IA-32 (CISC over RISC architecture found in 32-bit x86 CPUs)
  • IA-64 (EPIC variant VLIW architecture found in Itaniums)
• Internal affairs
• Information architecture
• the IATA code for Iraqi Airways
• Internal Assessment
• Indian Army