game, Spacewar!, was developed at Project MAC by Steve Russell, Martin "Shag" Graetz, Wayne Wiitanen, and other fans of the Lensman series. The Society is informal in its operations, but has developed an elaborate pseudo-hierarchy with officer titles such as "Skinner", "Lord High Embezzler", and "Onseck". However, actual theft and vandalism are regarded as serious crimes, and strict security rules have developed to protect the collection, such as requiring that all backpacks, permanent markers, and pens be left at the library entrance. A MITSFS seal has been developed, which is a further modification of the modernized version of the MIT Official Seal. The figure on the left wears something resembling a space helmet on his head, and the figure on the right brandishes what looks like a ray gun. The latter figure may also have three legs. The greatest ongoing challenge for MITSFS is finding sufficient physical space for its tightly packed and ever-growing library collection. More than 45,000 books are crammed into less than of space, and some 16,000 volumes of its collection must be stored offsite in a warehouse. Library The over 60,000 volumes constitute the "world's largest open-shelf collection of science fiction"; although the Eaton collection of the University of California, Riverside is larger, that collection is not on open shelves. According to MITSFS, the library once included "over 90% of all science fiction ever published in English", although a profusion of self-publishing now may have outdistanced it. The library is freely available for browsing by the public, as well as for borrowing by members. Membership is open to anyone who pays the modest dues and agrees to abide by the rules. The library is financially supported by membership dues, and by MIT's Association of Student Activities funding board. The catalog of the library may be searched online through the PinkDex. Some of the library's contents include full runs of Astounding Science Fiction and other American science fiction magazines, and full or nearly full runs of the major American fantasy magazines. It has first editions of The Lord of the Rings, editions in French and German of The Hobbit, all of the paperback versions of the series, CDs of the series, copies of all of Tolkien's related works, and so on. In fantasy, it has all of the Harry Potter books, with some also in German and Russian. The collection is physically located in MIT's Julius Adams