PL/I (Programming Language One) is a powerful, high-level procedural programming language developed by IBM in the 1960s for scientific, engineering, and business applications. It is known for being a flexible, free-form language that combines features from FORTRAN (scientific) and COBOL (business), supporting structured programming, pointer manipulation, and exception handling.
IT testing (software testing) is the process of evaluating software to ensure it functions correctly, safely, and efficiently according to requirements. It identifies bugs, enhances performance, and validates that the system meets user needs before release. Key types include functional (what it does) and non-functional (how it performs), utilizing both manual and automated methods.
Scrum is a lightweight, agile framework designed to help teams deliver complex products incrementally through collaboration, accountability, and iterative progress. It breaks work into short, time-boxed iterations called sprints (typically 1–4 weeks), focusing on continuous improvement, adaptability, and high-quality results.
IBM Explorer for z/OS (z/OS Explorer) is an Eclipse-based integration platform that allows developers and system programmers to manage z/OS resources—such as MVS files, JES jobs, and UNIX files—from a remote workstation. It acts as a central hub for connectivity and tools, offering a modern, GUI-driven interface to interact with mainframe systems rather than relying [...]
IBM Developer for z/OS (IDz), is an Eclipse-based integrated development environment (IDE) used for creating and maintaining mainframe applications. It facilitates modern DevOps practices for languages like COBOL, PL/I, and Java. Alternatively, it refers to Industrial Development Zones in economic contexts.
COBOL (Common Business-Oriented Language) is a high-level, English-like programming language developed in 1959 for business data processing. Designed for readability and maintainability, it is a procedural, compiled language still widely used today in mainframe systems for large-scale, transaction-heavy operations in finance, government, and industry.
.NET is a free, open-source, and cross-platform developer platform created by Microsoft for building diverse applications, including web, mobile, desktop, gaming, and IoT. It supports multiple languages (C#, F#, Visual Basic) and provides a unified environment with libraries, tools, and a runtime (CLR) for secure, high-performance execution on Windows, Linux, and macOS.
Java is a high-level, class-based, object-oriented programming language designed to have as few implementation dependencies as possible. Known for its "Write Once, Run Anywhere" (WORA) capability, Java code compiles into bytecode that runs on any device equipped with a Java Virtual Machine (JVM), making it highly portable and platform-independent.
App development is the process of creating software for mobile devices and computers, involving strategic planning, UI/UX design, coding, testing, and deployment. Key methodologies include native development (iOS/Android), cross-platform frameworks, and no-code builders. Development focuses on user experience to drive engagement.
Unix is a foundational family of multitasking, multi-user operating systems originally developed in 1969 at AT&T Bell Labs by Ken Thompson and Dennis Ritchie. Known for its portability, hierarchical file system, and shell scripting, it influenced modern systems like Linux, macOS, and Android. It is characterized by a "philosophy" emphasizing simplicity and modular, text-based tools.
Linux on IBM Z (also known as zLinux, Linux/390, or Linux/390x) is the collective term for the Linux operating system, including Red Hat Enterprise Linux, SUSE, and Ubuntu, compiled specifically for IBM Mainframe servers (Z and LinuxONE). It enables high-security, scalable, and energy-efficient workload consolidation, often hosting thousands of containers or virtual machines on a [...]
Linux is a widely used, open-source Unix-like operating system kernel first released by Linus Torvalds in 1991. It is renowned for its security, stability, and flexibility, powering everything from internet infrastructure and supercomputers to Android phones and embedded devices. Linux is distributed in various "distributions" (distros) like Ubuntu, Fedora, or Mint, which bundle the kernel [...]
The IBM AS/400 (Application System/400), introduced in 1988, is a highly secure, scalable midrange computer system known for its exceptional reliability, integrated DB2 database, and "single-level storage" architecture. Renamed through various iterations (eSeries, iSeries, System i) and now part of IBM Power Systems running IBM i, it remains in use for heavy-duty business, finance, and [...]
IBM zEnterprise Systems are high-performance, secure mainframe computers designed for mission-critical workloads, integrating z/OS, Linux, and AIX across hybrid environments. They utilize the Unified Resource Manager for centralized management of zEnterprise EC12/BC12 servers and BladeCenter extensions, offering superior scalability, resiliency, and transaction processing. Modern systems like the z16 support real-time AI and quantum-safe security. For those interested in working with these [...]