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 The 729 series was superseded by 9 track tape drives introduced with the IBM System/360.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
Pennsylvania Route 729 during the 1930s and early 1940s. Pennsylvania Route 729 Pennsylvania Route 729 (PA 729) is a , north–south state highway located in Clearfield County, Pennsylvania. The southern terminus is at PA 253/PA 453 in Gulich Township. The northern terminus is at US 219/PA 879 in Grampain. PA 729 is known by two names along its route. The two names it goes by are Main Street, and more commonly, the Tyrone Turnpike. The route begins at the village of Janesville at an intersection of PA 253/PA 453. The route heads northwest to the town of Glen Hope, where the route has