Simplify the following text for a Grade 15 native English-speaking person.
Original: Additionally , Microsoft sold Windows 2000 Advanced Server Limited Edition and Windows 2000 Datacenter Server Limited Edition , which were released in 2001 and run on 64-bit Intel Itanium microprocessors .
Simplified: Additionally , Microsoft offers Windows 2000 Advanced Server - Limited Edition and Datacenter Server - Limited Edition , which were released in 2001 and runs on 64-bit Intel Itanium processors .