NEW YORK -- Big brother may be watching at work, but that's not deterring today's workers.

Despite the fact that nearly one-half (45 percent) of office workers have been explicitly informed their at-work technology usage is monitored, a majority still use their employers' technology resources for personal reasons, according to a new survey conducted by Harris Interactive.

Seven of 10 (69 percent) U.S. adult office workers access the Internet at work for non-work purposes, and the same proportion (69 percent) make or receive personal phone calls on their work telephone. More than one-half (55 percent) send and receive personal messages on their work email accounts.

Moreover, nearly three of four (73 percent) office workers are either as or more likely to use the Internet at work for personal reasons than they were two years ago; sixty-eight percent are as or more likely to send or receive personal emails on their work accounts.

Today's young office workers are making their private lives available online, leaving themselves vulnerable to unintended exposure to employers.

Seventy-one percent of workers age 18 to 34 maintain some type of personal Web site, the most common of which are personal blogs or networking accounts such as those on MySpace or Facebook, maintained by 52 percent of young workers. Thirteen percent currently have an online dating account.

Young workers are also the most likely to use their employers' technology for personal reasons. Nearly three-in-four (72 percent) check their personal email accounts during work (compared to 61 percent of the general population), and 77 percent use their work Internet personally (compared to 69 percent of office workers overall).