In the realm of the tech of today, if I mention the phrase “programming language”, people will prob­ably jump to the likes of Python, JavaScript or Java. However, you may not have known that there is a vast universe of programming languages that applications on the most important computers and devices today are based on. Yes, Mainframes are the talk of the season; they are still the main players in the league, providing much of the backbone support for many critical systems like banking and healthcare.

A programming language created or modified especially for use on mainframe systems is known as a mainframe language. Large, strong computers known as mainframes are usually employed by big businesses to process enormous amounts of data and carry out essential tasks.

One can almost think that mainframe programming is long gone but contrary to that, it still running in good condition and is popular. Let us dive into the world of mainframe programming languages, the seemingly combination of retro and modern.

1. COBOL: The life of Mainframe Languages

If there is a language that goes back to oldest times, that’s COBOL for you! COBOL, which stands for Common Business Oriented Language, has been the driving force behind mainframe applications since 1959. It’s almost the antique in the field of programming, as it has got vast age with over 50 years of life span.

Of course, COBOL being a little wordy, might be perceived as a shortcoming by some, but that’s the very essence of it – that legacy. Its simplicity and clarity gives it no limit, so it works excellent for performing complex business, which it also continues to be used nowadays in the industries such as banking and government.

2. Java: Bounding Modernity for Mainframes

In the mid 1990's , Java arrived on the block stage , boldly declaring its object-oriented nature and putting cross-platform compatibility at the core of its value proposition . Having been created for years after mainframes existed, but strong enough to become a part of them, Java has been always destined to be on these giant machines since the beginning.

Java had an advantage to run on any type and OS so that it became a logical choice for the mainframe. On top of that, its object‑oriented approach lets you develop modular and scalable applications, and it works on basically any kind of platform – that is, from a computer to a smartphone or a mainframe.

3. C and C++: The power team.

Initially intended for Unix systems, C with its swishy cousin, C++, have also made their presence felt on mainframe computers. We may find their syntax a tad rough, but making them will be worth the trouble. They are systematically quick, adaptive, and genius for squeezing everything possible from your mainframe apps.

C++ as such brings in the best of both worlds by following the simplicity of C and infusing a bit of OOPS which is characteristic of Java. It’s like the Swiss army knife of the programing languages that can deal with a wide range of tasks, unless there is some Thor in the room that you need to handle anything placed in front of it.

4. Assembler: Bringing It to the Point.

Do you like to delves into the mind of your computer systems? It is here that the machinery of that very thing named Assembler becomes useful. Although it’s far from everyone’s ideal language, Assembler will surely appeal to people who like being in charge of every aspect of their projects, striving to squeeze the very last bit of performance.

After all, going straight from higher level languages to writing Assembler code without help is like jumping into the ocean without a life jacket. But, thus way, it is a symbol of reward for several mainframe developers. In addition to Assembler and debugging routine, understanding of the mastering it will give you that type of feeling that you are an ultimate magician in the mainframe world.

5. REXX: The First-rate Interpreter

Of course, if the prospect of having to run your script before it will operate actually fills you with fear, don’t worry! REXX is here to crush the problems. REXX is the fastest interpreted language used on the mainframes, you don't need to compile your code allowing you to run your program directly without any hustle.

Although REXX does not have a lot of fancy features compared to some other programming languages, it has nonetheless earned a place among the favorites of mainframe developers thanks to its simplicity and quick learning curve. And at the same time, what makes programming really fascinating is the instant fulfilment one gets when witnessing his or her code coming alive after inputting just a few keystrokes.

6. Any Language on Linux: The Wildcard.

The Linux implementation offers you the possibility of turning any language into the mainframe you are working with. No matter whether you’re a Python lover, the Perl Diligence or all other people who worship for the Ruby, you have a room on the mainframe.


Thus, the ultimate picture of mainframe programming language is depicted in your head now. From the classic COBOL to the futuristic Java, the wide range of languages from this language spectrum will strike any coder as deeply fascinating. Therefore what are you waiting for? Get the process started, and you may see what wonders mainframe has in store for you.