Helvetica Neue is the version of Helvetica that was modified and digitised for Linotype by D Stempel AG in 1983. The original Helvetica was added to over the years but not in any coordinated manner—hence, the reworking involved structurally unifying heights and widths. It also has heavier punctuation marks and increased spacing in the numbers compared to the original design. The Helvetica Neue family consists of 51 weights, which are named using a numerical system borrowed from Univers. The weights range from 25 Ultra Light to 107 Extra Black Condensed, with 55 Roman being the central point. Apple uses Helvetica Neue as the system font for OSX Yosemite.