History Of Technology in Education

                               HARD DISK DRIVE “THE 1 ST MAGNETIC SLURRY COATING ON THE 1 ST DISK DRIVE WAS POURED ……FROM DIXIE CUP”                            Johnson and IBM gives computer users direct access to their data ……  Introduction                                                               For most of the twentieth century, the primary medium for data entry, storage and processing was the punched card.in the 1930’s IBM hired teachers and inventor Reynold B. Johnson(1906-1998) to develop the IBM 805 test-scoring machine to convert pencil marks on forms in to punched cards.20 Years later, Johnson Led the team that developed the technology that made the vast majority of punched cards obsolete- The Hard Disk.   Information                                                                Finally Johnson and his team made a model hard disk but a main problem was come out that was the read-write heads from hitting and damaging the disks. Jhonson and his team was solved th