Accu-Chek Aviva Combo Owner's Booklet page 290

Abbreviation
IR
ISO
KE
LCD
mg/dL
N/A
NIST
PIN
PM
RF
SD
U
284
Definition
Infrared
International Organization for Standardization
Kohlenhydrateinheit (equal to 10 grams of carbohydrates)
Liquid Crystal Display
Milligrams per Deciliter
Not Applicable
National Institute of Standards and Technology (United States)
Personal Identification Number
Post Meridiem (12-hour clock notation for "after noon")
Radio Frequency
Standard Deviation
Units (bolus insulin units)