Mathematical instruments; memory aids; memory aids in the form of a slide rule-like arrangement to enable combinations of letters to be formed in a controlled manner; calculating discs; calculating machines; slide rules; data processing apparatus; context-sensitive database searching apparatus; electronically-accessible context-sensitive database searching apparatus; position-locating devices; software for use with computers or telephones

Mathematical instruments; memory aids, including such aids in the form of a slide rule-like arrangement to enable combinations of letters to be formed in a controlled manner; calculating discs; calculating machines; slide rules; data processing apparatus; context-sensitive database searching apparatus, including such apparatus accessible electronically; position-locating devices; software for use with computers or telephones

Mathematical instruments; memory aids, including such aids in the form of a slide rule-like arrangement to enable combinations of letters to be formed in a controlled manner; calculating discs; calculating machines; slide rules