History of the United States (1918–1945) (especially poor people) and prevent inflation. Tires were the first item to be rationed in January 1942 because supplies of natural rubber were interrupted. Gasoline rationing proved an even better way to allocate scarce rubber. By 1943 one needed government issued ration coupons to purchase typewriters, sugar, gasoline, bicycles, footwear, fuel oil, silk, nylon, coffee, stoves, shoes, meat, cheese, butter, margarine, canned foods, dried fruits, jam, and many other items. Some items—like new automobiles and appliances—were no longer made. The rationing system did not apply to used goods (like clothes or cars). The ration system was complex and confusing, but
Serial Item and Contribution Identifier to officially register the SICI namespace for URNs with IANA was made in 2002, but is currently dormant. SICI codes can be used as the "item ID" in a DOI identifier. In the following example, the number 10.1002 is the DOI's "publisher ID", a slash acts as a separator, and the rest, which is publisher-specific, is the SICI code: CrossRef no longer allows DOIs with colons to be registered, greatly reducing the usefulness of such SICIs. Serial Item and Contribution Identifier The Serial Item and Contribution Identifier (SICI) is a code (ANSI/NISO standard Z39.56) used to uniquely identify specific volumes,