RSI explained

RSI may refer to:

Broadcasting services

Radio Singapore International, a former radio broadcaster in Singapore
Radio Slovenia International, the international service of Slovenian state radio
Radiotelevisione svizzera di lingua italiana, a Swiss radio and television broadcaster

Relative strength index, a technical indicator used in the analysis of financial markets
Revenue and Social Insurance number, an identifier used for tax and welfare purposes in Ireland

Rapid sequence induction, a method of emergency intubation, involving paralytics and sedation
Repetitive strain injury, a disorder affecting muscles, tendons and nerves from repetitive movements, forceful exertions, vibrations, mechanical compression, or sustained/awkward positions
Residual self image, the concept that individuals tend to think of themselves as projecting a certain physical appearance
The Real, The Symbolic, and The Imaginary, a theory in Lacanian psychoanalysis concerning human perception of reality

RSI-value, a measure of how well a two-dimensional barrier resists the conductive flow of heat
Review of Scientific Instruments, a scientific journal

RSI Corporation, an American safety compliance consulting firm
RADARSAT International, a provider of data and information derived from the Canadian RADARSAT satellite program overseen
Red Sports International, an international sports organization supported by the Communist International
Research Science Institute, an international summer research program for high school students
Religious Science International, a religious organization

Ṛṣi, a term for an accomplished and enlightened person in Hinduism and Buddhism
Red Sea International Airport in Saudi Arabia
Regional Snowfall Index, a system used to assess the impact of winter storms in the United States
Italian Social Republic or Repubblica Sociale Italiana, a puppet state of Nazi Germany during the later part of World War II