The Things They Carried, Chapter 1

what dose the the athour mean by "Among the necessities or near-necessities "

pg.2 chapter 1

The things they carried were largely determined by necessity. Among
the necessities or near-necessities were P-38 can openers, pocket knives,
heat tabs, wristwatches, dog tags, mosquito repellent, chewing gum,
candy, cigarettes, salt tablets, packets of Kool-Aid, lighters, matches,
sewing kits, Military Payment Certificates, C rations, and two or three
canteens of water.