Plan B One-Step is an emergency contraceptive pill taken by mouth after unprotected sex. It is used to prevent pregnancy. It is not for routine contraceptive use and does not prevent against sexually transmitted diseases, including HIV.
Hazus is a geographic information system-based natural hazard developed and freely distributed by the Federal Emergency Management Agency (FEMA). In 1997 FEMA released its first edition of a commercial off-the-shelf loss and risk assessment software package built on GIS technology.
Sun Tzu is the reputed author of The Art of War (<Ping-fa), which some consider to be the best single book ever written on the subject. Of Sun Wu himself (Tzu is an honorific particle, meaning master), little is known beyond his birth in the state of Ch'i and service to King Ho-lu of Wu; he was a military specialist active during the turbulent late Chou dynasty.