31. GNU APL is a free implementation of ISO Standard 13751 and hence similar to APL2. 32. The international standards of the topic are published by ISO standards for the topic include 33. The ISO standard describe four qualities of distillate fuels and 10 qualities of residual fuels. 34. Outside of North America, most countries use ISO standards 35. The ISO standard very often have a 90?angle. 36. The following year a similar ISO standard was introduced. 37. Libes is responsible for numerous implementations of ISO standards and draft standards for product management. 38. There is no ISO standard for quartz timepieces, but there is development in this field. 39. The specification is now an ANSI and ISO standard . 40. The Technical Management Board is responsible for over 250 technical committees, who develop the ISO standards .
