This is the same as Ahem.ttf, with following changes:

• OS/2.sCapHeight is changed from 800 to 600.
• OS/2.sxHeight is changed from 800 to 200.
• The top of the 'x' glyph is modified to match the x-height, because some platforms compute the x-height from the glyph bounding box.

These changes were done by using the FontForge, an open source font editor.