Which of the following is used to search all the computers on a company's network?

A) Mobile surveys
B) Web directories
C) NAICS codes
D) Metasearch engines
E) Enterprise search engines

Enterprise search engines are specifically designed to search all the computers and resources present in a company's network, including databases, websites, and file systems. They can also provide advanced search features such as filtering and classification based on user permissions and roles. The other options (A, B, C, and D) are not designed to search a company's network. Mobile surveys are used to collect data from mobile devices, web directories are used to organize websites, NAICS codes are used to classify industries, and metasearch engines are used to combine results from various search engines.