Alex Vakulenko explains the differences in this table:

• 1 point (Truchet) = 0.188 mm (obsolete today)
• 1 point (Didot) = 0.3759 mm = 1/72 of a French Royal inch (27.07 mm) = about 1/68 inch
• 1 point (ATA) = 0.3514598 mm = 0.0138366 inch
• 1 point (TeX) = 0.3514598035 mm = 1/72.27 inch
• 1 point (Postscript) = 0.3527777778 mm = 1/72 inch
• 1 point (l'Imprimerie nationale, IN) = 0.4 mm

EXTERNAL LINKS
Difference between point systems
Google search page

INTERNAL LINKS
Type measurements ⦿

Luc Devroye ⦿ School of Computer Science ⦿ McGill University Montreal, Canada H3A 2K6 ⦿ lucdevroye@gmail.com ⦿ http://luc.devroye.org ⦿ http://luc.devroye.org/fonts.html