Siberian fur trade to overhunting. Instead of one sable pelt, the following was accepted as its equivalent: one fox, glutton (relative of the marten), or otter pelt; two blue-fox pelts; sixteen polar-fox pelts; or one hundred squirrel pelts. The Russian government decided the amount of other pelts that were equivalent to the sable pelt. Within forty years, almost all Siberian natives were forced into paying fur tribute to the Russians. Russian traders, hunters, and explorers reached the Pacific coastline by 1650 and were collecting fur tribute from most natives along the coast. Beyond the yasuk, the Russians had two principal ways of obtaining
PC Paintbrush competitor, Mouse Systems, bundled their mice with Mouse Systems' "PCPaint" in 1984. At Christmas 1984, amidst record sales volumes in the home computer market, Microsoft had created a "sidecar" bundle for the PCjr, complete with their mouse, but with their competitor's product, "PCPaint". With the release of Paintbrush the following year, Microsoft no longer needed to sell the software of their competitor in the PC mouse hardware market in order to have the same market advantage. Microsoft's mechanical mice outsold Mouse Systems' optical mice after a few years, but "PCPaint" outsold Paintbrush until the late 1980s. Unlike most other applications