The reason that it is the #1 choice is that Tylenol is effective, inexpensive, does not require a prescription, and safer than the non-steroidal anti-inflammatory medications such as Aleve* (Naprosyn, naproxen sodium), Advil (Motrin, ibuprofen), and others.
A CLEC is a mini telephone company. CLEC stands for Competitive Local Exchange Carrier. The telecommunications act of 1996 had provisions in it designed to spark competition between local and long distance telephone carriers.
OPSEC is threat driven, concerned with specific identified threat(s) against an activity where traditional security programs concentrate on a generalized threat and are not situation-specific. OPSEC is a fluid process that is controlled by the commander; it is not a lock-step program solely directed by regulations. OPSEC addresses all exploitable sources of information, not just the classified. It looks at what we have to do and how we operate.