The company began 64-bit development in 1991, and the first systems with its 64-bit Itanium CPUs shipped in 2001. Intel has been the microprocessor industry's 800-pound gorilla from the beginning. The next step in this evolution is the 64-bit CPU. These bit numbers describe the length of the instruction word the CPU can handle in a single clock cycle.
Some years back, desktop computers used 8-bit microprocessors (such as the Zilog Z80) then came 16-bit chips (the Intel 8086 and Motorola 68000). Nowadays most computers use 32-bit processors (such as the Intel Pentium) running 32-bit operating systems (such as Windows XP, Mac OS, Unix or Linux). Listen to the Computerworld TechCast: 64-Bit CPUs
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