Origins; Types of computers; General purpose; Scientific; Scientific AND general purpose?; The PC; The Graphical User Interface (GUI); The application development backlog; The Local Area Network (LAN); Who runs the distributed data centre?; Total Cost of Ownership (TCO); Today's real world; What is a mainframe?; What can it do?; Hardware and software; Types of computing; Batch; Batch processing today; Interactive; On-line; Real time.
Enterprise Computing HardwareEnterprise computing hardware; An IBM mainframe computer room and its contents; The processor complex; Parallel sysplex; Logical partitions; Channels; Controllers; I/O units; Addressing; Local and remote; Disk storage; Old technology; Storing data on a traditional disk; The cylinder concept; Sectors; Cache storage; RAID - a newer technology; Disk Mirroring (RAID-1); Data Striping (RAID 5/6); Remote Disk copy; Virtual disks; Why magnetic tape?; Tape cartridges; High performance tapes; Automated Tape Libraries; Virtual Tape Servers; Other Input/output peripherals.
z Systems ProgramsWhat is software?; Types of software; System software; Exits; Application software; What does a program comprise?; Main module; Subroutines and procedures; Functions; Data; EBCDIC; ASCII; Building a program; Programming languages; Executing a program.
Practical OperationsWho runs the IT environment ?: Operators, Help Desk Operatives, Security Administrators, Systems Programmers, Storage Administrators, Network Analysts, Application Developers/Support, Database Administrators.
The z Systems' Operating Systemsz Systems operating systems; z/OS operating systems; zVM operating systems; z/VSE operating systems; Linux operating systems; z/TPF operating systems.
z/OS Operating SystemThe z/OS operating system; Some important definitions; Address spaces; Common area; Private area; Main components of MVS; MVS processing environments; On-line; TSO; z/OS communications server; VTAM; TCP/IP; JES: JES2, JES3; Transaction Servers: CICS, IMS; Databases: DB2, IMS; UNIX System Services; WebSphere Application Server.
Numbering SystemsNumbering systems; Decimal arithmetic; Binary arithmetic; Binary subtraction; Negative binary numbers; 2's complement; Hexadecimal arithmetic; Hexadecimal / binary relationship; Extended Binary Coded Decimal Interchange Code; Packed decimal numbers; Memory addressing.
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Greece is experiencing a significant digital shift, with Athens and Thessaloniki becoming emerging centers for international tech investments and startup growth. Supported by world-class academic institutions such as the National Technical University of Athens, the country is focusing on modernizing its digital infrastructure and expanding its software development capabilities. Greece's strategic location makes it an important gateway for tech services between Europe and the Middle East, attracting global giants for data center and cloud projects. Our training programs in Greece focus on bridging the gap between academic theory and the practical demands of the modern tech market. By offering specialized courses in Web Development, Cloud Infrastructure, and AI, we empower Greek IT professionals to compete effectively on the global stage.