Acronyms & Abbreviations

The definition of RI is:

Chicago, Rock Island and Pacific

Chicago, Rock Island and Pacific Railroad

Chicago, Rock Island and Pacific Railway

Mandala Airlines

Racial Immunity

Radar Indication

Radar Input

Radar interferometry

Radar Interrogation

Radiation indicator

Radiation intensity

Radiation, Inc.

Radiation-induced

Radio Identity

Radio Inertial

Radio Influence

Radio Infrastructure

Radio Installation

Radio interference

Radio Interferometer

Radio Isotope

Radioactive isotope

Radiographic Inspection

Radiographic inspector

Radioiodine

Radioisotope

Radioisotope therapy

Radiolocalization indices

Radiological Instrument

Radionuclide

Radionuclide imaging

Radius

Radius incompletus

Raffles Institution

Railway Inspectorate

Ralston Intermediate

Random-interval

Raney Intermediate

Range Instrumentation

Rankin Inlet

Rate Index

Ratio

Ratios

Raw Image

Rayleigh Instability

Rayleigh Interferometer

REACT International

Reactive Intermediate

Reactivity Index

Reactor incident

Reactor island

READ IN

Real Image

Realms Of Inquiry

Receiving Inspection

Receptor I

Receptor type I

Recession index

Reciprocal inhibition

Recitation Instructor

Recombinant inbred

Recombinant isogenic

Recombination index

Recommended intakes

Reconnaissance Inspection

Reconnaissance investigation

Record Item

Recovery index

Recrystallization inhibition

Rectifier Instrument

Recurrent inhibition

Reduced-intensity

Reference Identifier

Reference Implementation

Reference Implementations

Reference Indicator

Reference intervals

Reference Number

Referential Integrity

Reflective Insulation

Reflex inhibition

Reflux index

Refraction Intercept

Refractive index

Refugees International

Regenerative index

Regional ileitis

Regional Intermediary

Regional ischemia

Registered Inspector

Registro Italiano

Regular index

Regular insulin

Regulatory subunit

Regulatory type I

Regurgitant index

Reinjection

Reinsurance

Relapse incidence

Relationship by isonymy

Relative incidence

Relative inhibition

Relative Intensity

Relay Interlocking

Release inhibition

Relevant information

Reliability improvement

RELIABILITY INDEX

Relief International

Religious Instruction

Remedial Investiagtion

Remedial Investigation

Remission induction

Remodeling index

Remote infection

Remote Installation

Renal impairment

Renal index

Renal insufficiency

Rename Inhibit

Renin inhibitor

Repairable item

Repartidor Intermedio

Repeat Indication

Reperfusion injury

Replace Item

Replication index

Replication intermediate

Replication-independent

Replicative index

Replicative intermediate

Replicative intermediates

Repopulation index

Report of Investigation

Representation Invariant

Reproducibility Index

Reproductive Immunologist

Republic of Indonesia

Republica Italiana

Request for Information

Request Indicator

Requirement Integration

Requirements Identified

Research Infrastructure

Research Institute

Research Instrumentation

Reset Indication

Resident inspector

Residual Income

Residual inhibition

Residual inhibition of tinnitus

Resistance

Resistance index

Resistance indexes

Resistance indices

Resistance-Inductance

Resistant index

Resistence index

Resistive

Resistive index

Resistive indices

Resistivity

Resistivity index

Resistivity indices

Resolution of the Identity

Resonance integral

Resonance Ionization

Resource Index

Respiratory illness

Respiratory illness, infection

Respiratory index

Respiratory infections

Respiratory insufficiency

Response Identifier

Response index

Response interval

Responsible individual

Restart Indicator

Restriction Indicator

Retention index

Retention indices

Retention interval

Retention intervals

Reticulocyte index

Retinal Image

Retirement Income

Retro-inverso

Retroactive inhibition

Retroactive interference

Retrograde index

Retrograde intrabiliary

Retroinsular area

Retroinsular cortex

Reunion Island

Reverse Index

Reyburn Intermediate

Rhesus isoimmunisation

Rhode Island

Rhode Islanders

Rhodes Island

Rial

Ribonuclease inhibitor

Ribonuclease inhibitor protein

Ribophorin I

Ribosome

Richardson Number

Rideability Index

Ridgecrest Intermediate

Rifampicin

Rigidity index

Rincon Intermediate

Ring In

Ring Indicate

Ring Indication

Ring Indicator

Ring Interface

Risk Improvement

Risk index

Risk Investigation

Ritchie Index

Rivera Intermediate

RNA index

RNase inhibitor

Robertson Intermed

Robotics Institute

Robotics International

Rock Island

Rockefeller Institute

Rocklin Independent

Rockwell International

Rodale International

Romantic interest

Roofing Industry

Rooming-in

Root-inducing

Rosette index

Ross Institute

Rotary International

Route Index

Router Information

Routine Indicator

Routing Identifier

Routing Identifiers

Routing Indicator

Routing information

Royal Institution of Great Britain

Ruby Tuesday, Inc.

Runway incursion

Rush immunotherapy

Ryukyu Islands