[rocket family] Indonesian National Institute of Aeronautics and Space`s solid fuel rockets are classified as `RX` (Roket Eksperimental), followed by their diameter in millimeters. For example, the RX-100 has a diameter of 100 mm. ==Rocket engines== This family is composed by: ==Multistage rockets== ... Found on http://en.wikipedia.org/wiki/RX_(rocket_family)
This should be a symbol ? resembling an R and an x combined. It appears at the start of a prescription. It is an abbreviation for recipe, which is Latin for “take thou�
Found on http://www.encyclo.co.uk/visitor-contributions.php
Rx Recipe; take. An abbreviation used at the beginning of a medical prescription. This has been a symbol used by pharmacists since ancient times. There is supposed to be a slant bar across the base of the R (℞) and it represents the sign of the Roman god Jupiter, under whose special protection all medicines were placed. The letter itself ... Found on http://www.wordinfo.info/words/index/info/view_unit/3480/2