A case of canvas, leather, nylon, or other sturdy fabric, fitted with straps, for carrying on the back the food, clothing, or other supplies for a soldier or a traveler; as, to hike up the mountain with lunch in a knapsack.

a bag carried by a strap on your back or shoulder

A bag made of sturdy material and furnished with shoulder straps, designed for carrying articles such as camping supplies on the back. line Soldiers assigned duty as Infantry, Field Artillery and Cavalry, serving in "line units" or "front line units". linen Thread made from fibers of the flax plant. Cloth woven from this thread.

A backpack containing water and with a pump-action nozzle

See - BACKPACK

EDI system,It's a interface to any other system in EC firm.This system is based on EDIX12 stardand.

a good idea though