MUMPS

MUMPS, also known as Massachusetts General Hospital Utility Multi-Programming System, is a programming language created by Neil Pappalardo, Octo Barnett, and a team at Massachusetts General Hospital in 1966. It is primarily used in healthcare, financial systems, and database applications. Developers can access MUMPS via official implementations such as MUMPS Official Site, which provides compilers, runtime environments, and documentation for Windows, Linux, and UNIX platforms.

MUMPS exists to provide an integrated language and database environment for high-performance transaction processing. Its design philosophy emphasizes hierarchical database storage, compact syntax, and efficient string and array handling. By combining language and database capabilities, MUMPS solves the problem of developing large-scale, high-reliability systems with minimal overhead and fast access to structured data.

MUMPS: Variables and Data Structures

MUMPS uses dynamically typed variables and hierarchical arrays (globals) for storage.

SET name = "MUMPS"
SET age = 57
SET ^Patients(1,"Name") = "Alice"
SET ^Patients(1,"Age") = 30
WRITE "Language: "_; name, ", Age: "_; age

Variables can be local or global, and globals persist across sessions. This hierarchical array model is unique but conceptually similar to nested dictionaries in Python or associative arrays in Perl.

MUMPS: Procedures and Subroutines

MUMPS defines reusable logic with procedures and subroutines.

AddPatient(Name, Age)
  SET ^Patients($I(^Patients)) = Name
  SET ^Patients($I(^Patients),"Age") = Age
  QUIT

Subroutines are invoked using DO statements. This procedural model is similar to C++ and Perl subroutines.

MUMPS: Control Structures

MUMPS provides IF, ELSE, FOR, WHILE, and looping constructs.

SET i=0
FOR  SET i=$ORDER(^Patients(i)) QUIT:i=""  DO
. WRITE ^Patients(i,"Name"), " - ", ^Patients(i,"Age"), !

These structures allow iteration over hierarchical data efficiently. The flow control is analogous to loops in C++ and scripting languages like Perl.

MUMPS: String and Database Operations

MUMPS excels in string manipulation and database integration.

SET patientName = ^Patients(1,"Name")
SET patientAge = ^Patients(1,"Age")
WRITE "Patient: "_; patientName, ", Age: "_; patientAge

Direct access to hierarchical globals provides fast and persistent data storage, a feature unique among programming languages but conceptually comparable to embedded databases in C++ or key-value stores accessed via Python.

Overall, MUMPS provides a powerful, integrated programming and database environment optimized for healthcare and transaction-heavy systems. When used alongside C++, Python, and Perl, it enables developers to build reliable, efficient, and maintainable applications. Its combination of hierarchical storage, dynamic typing, and procedural programming makes MUMPS a specialized but enduring tool for mission-critical systems.