Infinity symbol in bookbinding to indicate that a book is printed on acid-free paper and will therefore be long-lasting. In modern mysticism, the infinity symbol has become identified with a variation of the ouroboros, an ancient image of a snake eating its own tail that has also come to symbolize the infinite, and the ouroboros is sometimes drawn in figure-eight form to reflect this identification, rather than in its more traditional circular form. In the works of Vladimir Nabokov, including "The Gift" and "Pale Fire", the figure-eight shape is used symbolically to refer to the Möbius strip and the infinite, for instance
Sideways address space and BBC Master all featured Sideways RAM as standard. The machines used the 8-bit 6502 and 65C102 processors with a 16-bit address space. The address space was split into 32 KiB RAM (0x0000 to 0x7FFF), 16 KiB Sideways address space (0x8000 to 0xBFFF) and 16 KiB operating system space (0xC000 to 0xFFFF). The Sideways address space is a bank-switched (referred to by Acorn as "paged") address space that allows access to one 16 KiB bank at a time. Each bank can be ROM or RAM. On both the BBC Micro and the BBC Master, there are ROM sockets on the