Of late, the R language has gained popularity in the technology circles. R language is counted among the open source program, which is maintained by R –Core development team. This team comprises of developers all across the world who work voluntarily.
This language is used to carry out many statistical operations, while it is a common line driven program. It was developed by John Chambers and his team at Bell Labs in the US for implementing S programming language. There are several benefits of using this language, which give people from different industries a reason to adopt it. It is among the best machine learning and data analysis language. 
People making a career in the domain of data analytics course can find good R programming opportunities. If you are new in this field and want to learn and master, have a look at the list of 15 Terms everyone in the R Programming Industry Should Know, have a look:
1). Mean in R – The mean in R is the average of the total numbers, which are calculated with the central value of a set of numbers. For calculating this number, you simply have to add all the numbers together and then divide by the available numbers found there.
2). The compiler in R– It is something that helps in transforming the computer code, which is written in one programming language (to be precise the source language) into the other compiler language, which is the target language.
3). Median in R – It is a center of the sorted out list of numbers, however, if the numbers of even, things are different to some extent. In the case of the R language, first, you have to find out the middle pair of numbers followed by finding out the value of the midway number. The numbers are added and then divided by two to get the same.
4). Variance in R – It is basically the average of squared difference that is found from the Mean.
5). A polynomial in R – If you break this terminology you will get the meaning. Poly is many and nominal is a term, which means many terms.
6). Element Recycling – The vectors of diverse lengths when coming together in any operation then shorter vector elements are reused for completing the operation. This is known as element recycling.
7). Factor variable – These are categorical variables, which hold the string or numeric values. These are used in different kinds of graphics and particularly for statistical modeling wherein numerous degrees of freedom is allocated.
8). Data frame in R – These have diverse inputs in the form of integers, characters, etc.
9). The matrix in R – These have homogenous data types that are stored including similar kinds of integers and characters.
10). Function in R – Most of the functions in this language are the functions of functions. The objects in function fall under the local to a function, while these are returned to any kind of data type.
11). Attribute function in R – This function has an attribute of carrying out two different functions together. These include both the object and the attribute’s name.
12). The length function in R – This is the function that helps in getting or setting the right length of the vector/object.
13). Data Structure in R – It is a special kind of format that helps in storing and organizing data. These include file, array, and record found in the table and tree. 
14). File in R – It is a file extension for any script written in R language, which is designed for graphical and statistical purposes.
15). Arbitrary function in R – It is any function in a program; however, it is often referred usually to the same category of function that people deal with it.
Conclusion
There are many more things to learn and know about the R Language before you think about the R programming opportunities. The above is the modest list of terms found in R Language.