RTK

RTK may refer to:

Science and technology

 * Real-time kinematic positioning, a technique for precision satellite navigation
 * Receptor tyrosine kinase, high-affinity cell surface receptors

Other uses

 * Radio Television of Kosovo, public service broadcaster in Kosovo
 * Rentech (NYSE symbol), a former US company
 * Right to know, a human right enshrined in law
 * Remembering the Kanji (RTK1, RTK2, RTK3), books teaching Japanese Kanji