Response time in msec for pages and transactions (a page is a group of requests not separated by a thinktime).

connect

Mean duration (in msec) of the connection establishment only.

request

Mean duration of requests (in msec).

users

Number of simultaneous users (it's session has started, but not yet finished).

connected

number of users with an opened TCP/UDP connection (example: for HTTP, during a think time, the TCP connection can be closed by the server, and it won't be reopened until the thinktime has expired)