முன்னொட்டுச் சுட்டி
- R
- R2P
- RAAF
- RAC
- RACN
- RAF
- RAG
- RAM
- RAMS
- RAMSAR
- RAM card
- RAM compression
- RAW
- RBSK
- RCAF
- RCO
- RCT
- RDF
- RDP
- READ
- REBIA
- RED
- REMPEC
- REV
- RFH
- RFID
- RHL
- RIC
- RIM
- RKS
- RK galaxy
- RMG
- RMO
- RN
- RNA
- RNA primer
- RNC
- RO
- ROISAP
- ROM Basic
- ROSIDS
- RPA
- RPC
- RPF
- RPM
- RPM gauge
- RPU
- RQD
- RQN
- RRA
- RRD
- RS
- RSAA
- RSS
- RTFP
- RTG
- RTO
- RTOP
- RUW
- RVH
- RVT
- RXD
- R coronae borealis star
- R magnitude
- R star
- R wave
- Rabelaesian
- Rabha
- Race May
- Race rotation
- Raciology
- Radial arm:
- Radial axle
- RadiativeZone
- Rafferty
- Rain meter
- Rainbow Pride Parade
- Rainforest Action Network
- Rainforest Alliance
- Raipur
- Raised printing
- Rajasthani
- Rajesh
- Rajindra
- Rajkot
- Rajput Garasia
- Rajya Sabha
- Raleigh
- Raman effect
- Ramsay
- Ramsay - Raleigh method
- Ramsay Hunt's Syndrome
- Rana Tharu
- Ranchi
- Range at full speed
- Ranvier's nodes
- Rapa Nui
- Rapanui
- Rarotongan
- Rasputin
- Rathke's pouch
- Rathwi Bareli
- Rational thinking
- Ratitae
- Raum
- Raver
- Ravine
- Ravula
- Rawang
- Razor knife
- RealPlayer:
- Reality show
- Rechabite
- Recklinghausen's disease
- Rectifying Entries
- Red Cross
- Red Delicious
- Red Sea
- Redio communication
- Reductio ad Absurdum
- Reels
- Referee Drop The Ball
- Reference variable
- Refill
- Refugee
- Reg Grundys
- Regal Whiptail Catfish
- Registry Office
- Registry of the Federal Court Trial Division
- Reichert-Meissl number
- Reichstag
- Reimer-Tiemann reaction
- Reissner's membrane
- Reiterated
- Reli
- Remote Desktop Connection
- Remulakian
- Renjith
- René Descartes
- Representative personal account
- Reproduction in imagination
- Repubilc
- Republic of Albania
- Republic of China
- Republic of Djibouti
- Republic of Ghana
- Republic of Ireland
- Republic of Korea
- Republic of Madagascar
- Republic of Mozambique
- Republic of Namibia
- Republic of Senegal
- Republic of Singapore
- Republic of Turkey
- Republic of the Congo
- Restaurant
- Retite
- Rev limiter
- Revelations
- Reverberatoin
- Reverse Saturation Current
- Reynold's number
- Rh
- Rhadamanthus
- Rhet.
- Rhode Island
- Rhodesia
- Rhodophyceae
- Rhomhoids muscle
- Rhymer
- Ricketts
- Ridgen's penguin
- Ridgen's penguins
- Riemann zeta-function
- Right Paramedian Incision
- Right Sub Costal Incision
- Right of Minister
- Riism
- Rio Grande perch
- Ripuarian
- Risk compensation
- Riverine Ecosystem
- Road Safety
- Roaming
- Robert Coch
- Robert Gallo
- Robert Hooke
- Robert Koch
- Robert Mulliken
- Robertson
- Robotic Process Automation
- Roentgen
- Rogues
- Rohingya
- Rohini
- Rohu
- Rolle's theorem
- Roma
- Romance
- Romanche
- Romania
- Romanian
- Romanica
- Romansch
- Romansh
- Romantic movemen
- Romantic orientation
- Rombo
- Rome
- Rone
- Rope Car
- Rosenmund reduction
- Rosja
- Rota
- Rotarian
- Rotary
- Rotuman
- Rouget's rail
- Roult's law
- RoundTable
- Rouser
- Royal Botanical Gardens
- Roystonea regia
- Ru1P
- Ru5P
- Ruanda
- Rubber stamp works
- Ruckle
- Rue
- Rufiji
- Rukiga
- Rumania
- Rumanian
- Rumsen
- Run of Mine
- Rundi
- Rungwa
- Runner-up
- Runyambo
- Runyankore
- Runyoro
- Ruritania
- Russel's Viper
- Russia
- Russian
- Russian Federation
- Russian SFSR
- Russian Soviet Federative Socialist Republic
- Russian sturgeon
- Russophobia
- Rusyn
- Ruta
- Rutherford
- Rutland beauty
- Rutooro
- Rutter
- Rwanda
- Rwandan
- Ryemeal
- Rymer
- Rzeszów