IBM 729 the tape reel. A 3/4 inch gap between records allowed the mechanism enough time to stop the tape. Initial tape speed was 75 inches per second (2.95 m/s) and recording density was 200 characters per inch, giving a transfer speed of 120 kbit/s. Later 729 models supported 556 and 800 characters/inch (transfer speed 480 kbit/s). At 200 characters per inch, a single 2400 foot tape could store the equivalent of some 50,000 punched cards (about 4,000,000 six-bit bytes, or 3 MByte). The 729 series was superseded by 9 track tape drives introduced with the IBM System/360. The IBM 729 I
Cube of Space a cube. Cube of Space The Cube of Space is an occult concept that was popularized by the prominent occultist Paul Foster Case. The Cube of Space associates the three axes of the cube, the center point of the cube, the six sides of the cube, and the twelve edges of the cube, with the 22 letters of the hebrew alphabet. The Cube of Space is based upon two verses in the proto-kabbala text called the Sepher Yetzirah. One of those verses is in chapter 4 and the other verse is in chapter 5. The verse in chapter 4 associates