Abstract: An optical fiber cable includes: an optical fiber core wire, a reinforcing member selected from aromatic polyamide fiber (such as Kevlar) coaxially covering the optical fiber core wire, a left-turn spring coil leftward helically wound and continuously coaxially wound around the reinforcing member, a right-turn spring coil rightward helically wound and continuously coaxially wound the left-turn spring coil, and an insulator outer layer selected from polyvinyl chloride polymer coaxially cladding the right-turn spring coil to coaxially form an optical fiber cable for increasing anti-twisting property and other mechanical properties including increased tensile strength, compression strength, enhanced lateral pressure resistance; having advantages of lower production cost, and slimmed or fined cable diameter to be suitable for long-distance communication.

Abstract: Apparatus for supporting a computer pointing device such as a mechanical or optical mouse or a track ball unit within the footprint of a keyboard. The apparatus supports the pointing device over the keys of a computer keyboard to permit full use of both the pointing device and the keys. The apparatus comprises a platform positionable over at least a portion of the keyboard to support the pointing device and regions formed in the platform to permit manipulation of the keyboard keys through the platform. The regions can be openings through the platform to allow a user's fingers to press the keys directly. The regions can be deformable to permit a user to manipulate the keys underneath the platform indirectly. Alternatively, the keyboard itself can be designed with keys having specially shaped surfaces to support a pointing device.