Ask your computer's supplier how to remove the password in the event the password is lost. Some computers require that you remove a battery or a clock chip, others that you short out a jumper, flip a switch on the mother board, and on others you simply press a special key combination.
If you need to boot from a floppy disk (for example to recover from a disk crash) you will need to access the CMOS setup program to enable booting from diskettes. Remember that there may be two passwords -- one used to boot the computer, and another to access the CMOS setup program.