A (2) B (5) C (4) D (12) F (2) G (6) I (3) M (3) N (1) O (1) P (2) R (2) S (5) T (2) U (4) V (3) W (1)

This is a name for what could be described as automated website visitors. What they are doing is to automatically visit hundreds or thousands of websites in a very short period of time to either just collect their content for what ever reason and/or to utilise their interactive components to keep the web server behind them busy. There is not necessarily a business reason behind those robots, but they do exist and each website owner needs to deal with their traffic or form submissions.

When booking a server on the internet, you either get a managed server, which is managed by the company that runs the data warehouse. Or you get a server (a.k.a. virtual host) with root access, which allows you and your IT staff to fully manage that server themselves and without limitations.