Question: what are ways info technology improves productivity and performance? 

Answer: do you even know what you are asking? information technology is a field... pretty much anything to do with computers in a company...  Whether it be the hardware, the software, the network, administering, and managing the companies network, tech support, field work, programming, database management, or anything else you can think of for a companies computer system...
This question from the Yahoo Q&A forum is categorized in the topic: Computers & Internet