In the modern Latin alphabet “R” is the 18th letter. Frequency of R’s usage in words among all other alphabet is 5.987%.This letter is often confused with some other letters in some scripts.
Historical trace
The initial Semitic letter is derived from the Egyptian hieroglyph for tp which represents “head”. It was added into the Greek and Latin alphabet as Ρ ῥῶ (rhô) and R respectively. Later Etruscan and Western Greek languages have added some strokes to distinguish the letter“R” from the the letter “p”.
| Egyptian hieroglyph | Phoenician resh | Etruscan R | Later Etruscan R | Greek Rho |
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Pictorial representations from medieval ages
This form of “R” is from the script Old Roman square capitals.
This form is from the script rustic capital script which was written with curved lines.
This picture shows the uncial R.
This is the representation of New Roman cursive. It was written by using a single curved line
When “r” is used in pre-Carolingian minuscule scripts or National Hands, it has various forms in its appearance and can be easily confused with some other similar letters.
This form of “r” belongs to the 6th century’s half uncial script. In this type of representation “r” seems curvy and broad. The Curl that resides at the top was made to come down so it was created the image that resembles n.
This picture shows the representation of “r” from the 8th century’s old northern Italian book hand.
This representation is from Merovingian minuscule or Germanic book hand .
This representation is the variation of Merovingian minuscule. Formally it is known as Luxeuil minuscule.
This representation is from the script Visigoth which shows neat, compact form of “r”.
This representation is from the script known as insular half uncial. It is written with a long curve which comes down to the baseline. That actually makes the “r” to look like n.
This representation of “r” is from the Beneventan minuscule. This shape is same as many other European minuscule scripts.
The following representations shows “r” in various Carolingian scripts .
In this variant of Caroline minuscule, representation of “r” is small and neat.
This representation of “r” belongs to 12th century monastic charter .
This one is from papal curialis which has derived r along with its descender.This script was in use around 11th century.
This representation is from the 12th century diplomatic minuscule.
In the formal Gothic book hands, the letter r retains the Caroline minuscule form.
This form of “r” is taken from 12th century’s protogothic script.
This form of “r” is in informal notation. It may belongs to the 15th or early 16th Gothic textura script.
| Language | Pronunciation | Representation |
| Greek letter | Rho | Ρ ρ/ϱ |
| Cyrillic letter | Er | Р р |
| Cyrillic letter | Ya | Я я |
| Script capital | R | ℛ |
Character Encoding
The following table specifies value of “R” in some character Encodings
Character Latin Latin
Encoding capital letter R Small letter r
Decimal hex Decimal hex
Unicode 82 0052 114 0072
ASCII 82 52 114 72
UTF-8 82 52 114 72
EBCDIC 217 D9 153 99
What Does “R” Stand for in various fields?
General
R Denotes the Registered Trademark (normally as written ®)
Mathematics
R represents set of all real numbers. ( or R)
Technology
R represents the database system of IBM
R represents the programming language.
R denotes Ramp Time in wireless communication
Science
R represents the spectral resolution (astronomy).
R represents the Arginine which is an amino acid (chemistry)
R stands for Rontgen, which is a measurement unit for ionizing radiation.
R serves a measure of Relatedness, in biology.
