The most popular APC products:

BACK-UPS ES 500
BACK-UPS ES 350
BACK-UPS BX1500LCD
BACK UPS BX1300LCD
SMART UPS
BACK-UPS RS 550
BACK-UPS RS 550VA
BACK-UPS BR1500LCD
AP600I
500
BACK-UPS CS 500-RS
BACKUP-UPS RS 550
SMART 600
350
BACK UPS BR1300LCD
BACK-UPS ES 525
SMART-UPS RT 3000VA
AP600INET
AP600
120 VAC