RunTime Interrupt, a type of low level interrupt on some types of computer architecture.

Right to Information Act, a law enacted by the Parliament of India giving access to government records.

Road Traffic Information - the GPS navigation system in Volvo cars

Reverse transcriptase inhibitor, a class of antiretroviral drug.

Response to intervention - Related to education; involves examining the performance of individuals after an educational intervention

Radio Taiwan International

Radiodiffusion Television Ivoirienne - The state broadcaster of Ivory Coast

Runtime infrastructure, the software that is required when implementing the computer simulation protocol: High Level Architecture (HLA).

Real-Time Innovations, a company that provides middleware infrastructure, tools, and services to develop real-time distributed systems.

Research Triangle Institute, a not-for-profit organization performing research in many disciplines for government, industry and other clients throughout the United States and abroad.

RTI International Metals, Inc. - one of the world's largest titanuium companies

Reproductive tract infection - an infection that in women is considered to be nonfatal. If untreated, however, it may develop into a serious health problem such as Pelvic Inflammatory Disease, ectopic pregnancy, infertility, fetal loss, and cervical cancer.

Ramp travel index - a measure of an off road vehicle articulation (ability to keep all wheels in contact with the ground over an uneven terrain.

RTi, aka Matthew Cartwright, an electronica music artist.