List of IBM Z/TPF OS Customers
IBM
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Professional Services
293000
$67.5B
Since 2010, our global team of researchers has been studying IBM Z/TPF OS customers around the world, aggregating massive amounts of data points that form the basis of our forecast assumptions and perhaps the rise and fall of certain vendors and their products on a quarterly basis.
Each quarter our research team identifies companies that have purchased IBM Z/TPF OS for Operating System (OS) from public (Press Releases, Customer References, Testimonials, Case Studies and Success Stories) and proprietary sources, including the customer size, industry, location, implementation status, partner involvement, LOB Key Stakeholders and related IT decision-makers contact details.
Companies using IBM Z/TPF OS for Operating System (OS) include: Walmart, a United States based Retail organisation with 2100000 employees and revenues of $681.00 billion, Walgreens, a United States based Retail organisation with 206000 employees and revenues of $139.08 billion, Citigroup, a United States based Banking and Financial Services organisation with 230000 employees and revenues of $81.09 billion, American Express, a United States based Banking and Financial Services organisation with 75100 employees and revenues of $65.95 billion, Broadcom (inc. VmWare), a United States based Professional Services organisation with 33000 employees and revenues of $63.89 billion and many others.
Contact us if you need a completed and verified list of companies using IBM Z/TPF OS, including the breakdown by industry (21 Verticals), Geography (Region, Country, State, City), Company Size (Revenue, Employees, Asset) and related IT Decision Makers, Key Stakeholders, business and technology executives responsible for the software purchases.
The IBM Z/TPF OS customer wins are being incorporated in our Enterprise Applications Buyer Insight and Technographics Customer Database which has over 100 data fields that detail company usage of software systems and their digital transformation initiatives. Apps Run The World wants to become your No. 1 technographic data source!
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| Logo | Customer | Industry | Empl. | Revenue | Country | Vendor | Application | Category | When | SI | Insight |
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Accolades Badminton & Sports Academy | Leisure and Hospitality | 20 | $2M | India | IBM | IBM Z/TPF OS | Operating System (OS) | 2015 | n/a |
In 2015, Accolades Badminton & Sports Academy implemented IBM Z/TPF OS, an Operating System (OS) deployment used to support critical reservation-domain workloads. The implementation was positioned as a core operating layer for transaction-oriented reservation functions and formed the technical backbone for subsequent decommissioning and transition activities described in project documentation.
The IBM Z/TPF OS deployment focused on supporting reservation application components such as Customer Profiles and PNR Queues, reflecting transaction processing and high availability requirements typical of an Operating System (OS). Configuration and operational practices emphasized stable transaction throughput, maintenanceability and a handoff model to a dedicated Maintenance team that was created to drive customer issue resolution and runbook-based support.
Operational scope spanned product development, business analysis and customer support teams within the Reservation organization, with the project lead acting as single point of contact for software and hardware procurement for the Reservation group. Activities explicitly documented include planning and delivery management for reservation applications, coordination of airline cutover programs, and ownership of business continuity planning, process definition and execution for the Reservation team.
Governance was formalized by constructing a Maintenance team and department identity, instituting world class processes for issue management and procurement, and centralizing responsibility for documentation, milestones and dependency management during complex decommissioning work. The program also produced explicit organizational outcomes, including internal recognition through awards, published articles on customer experience, and continued transversal leadership in procurement and business continuity for reservation operations.
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Aer Lingus | Transportation | 4500 | $500M | Ireland | IBM | IBM Z/TPF OS | Operating System (OS) | 2014 | n/a |
In 2014, Aer Lingus implemented IBM Z/TPF OS. IBM Z/TPF OS is an Operating System (OS) used to host ALCS and TPF-based transaction processing workloads for airline reservation and booking systems. Aer Lingus IBM Z/TPF OS Operating System (OS) supports core reservation and high-volume transaction processing across passenger reservations and cargo management. The deployment aligns with ALCS operational design to provide a unified z/OS-hosted environment for transaction-heavy airline services.
The implementation leverages ALCS runtime characteristics, including the TPF/ALCS API and monitor-request macros, to minimize processing overhead. Application programs run as reentrant code, typically written in Assembler or higher-level languages such as C, COBOL, and PL/I, and interact with the monitor through Entry Control Blocks. Each entry uses a 4096 byte ECB with up to 16 data and storage levels, and ALCS provides dynamically allocated Data Event Control Blocks for advanced concurrent IO scenarios. Storage allocation is organized with most ALCS storage above 16MB while monitor-relevant regions remain below that boundary, and protection is enforced through Tables, Entry, and Global keys to isolate monitor and application state.
Integrations explicitly supported in the environment include DB2, MQSeries, APPC, and TCP/IP, enabling ALCS applications to participate in enterprise middleware and messaging flows. ALCS operates under z/OS as a job, providing a unified operating environment and compatibility with standard and airline-specific communication protocols. The solution supports high transaction rates and high availability patterns, including the High Performance Option for loosely coupled TPF systems and standby ALCS configurations for faster warm start recovery.
Operational governance emphasized application isolation and reentrant programming discipline to preserve stability and prevent cross-entry contamination. Dispatcher-managed FIFO work lists and strict storage management enforce sealed processing units per entry, supporting rapid restart and recovery behaviors. Outcomes documented in ALCS guidance include sustained high transaction throughput, robust isolation for reliability, and seamless integration within the z/OS ecosystem, making IBM Z/TPF OS the platform for Aer Lingus core transactional workloads.
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Aeromexico | Transportation | 17096 | $5.6B | Mexico | IBM | IBM Z/TPF OS | Operating System (OS) | 1991 | n/a |
In 1991, Aeromexico implemented IBM Z/TPF OS to support its high-throughput reservation and transaction processing workloads. The deployment was carried out within an ALCS/TPF online environment connected to SERTEL operations, positioning IBM Z/TPF OS as the Operating System (OS) underpinning Aeromexico reservation, inventory, and scheduling business functions.
Configuration work focused on activating and maintaining Hotel modules and related reservation components, with analyst programmers coding in ASSEMBLER, BAL and TPF languages. Explicit functional modules implemented or modified included Hotel modules, the Inventory Package, Schedule Change processing, NAR records and PNR handling, reflecting core support for reservations, inventory management and schedule management.
Operational coverage centered on telereservations and Maintenance Systems Direction, where development and maintenance processes were used to resolve system dumps and utility faults. Those remediation efforts are documented as having increased system performance, while ongoing ALCS/TPF operations supported online transaction integrity for Aeromexico.
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Aeroméxico | Transportation | 13880 | $4.9B | Mexico | IBM | IBM Z/TPF OS | Operating System (OS) | 2010 | n/a |
In 2010, Aeroméxico deployed IBM Z/TPF OS under the Operating System (OS) category. The implementation targeted high-volume transaction processing workloads on IBM mainframe class infrastructure, aligning the IBM Z/TPF OS installation with airline check-in and airport transaction services.
The IBM Z/TPF OS environment was configured to support real-time transaction runtime, message-driven I/O processing, and operationally hardened transaction dispatch typical of z/TPF deployments. Implementation work included support and maintenance activities tied to the SSCI Sabre Check-in system, with IBM Z/TPF OS hosting the check-in transaction processing logic and interfacing with airport security subsystems as part of the operational stack.
Operational coverage extended to airport operations and ground services, with documented on-site support activity at Bogotá Airport, Colombia, and local support engagements for Aeroméxico teams. The deployment emphasized continuous operations and localized technical support for check-in and terminal processing workflows across Aeroméxico airport touchpoints.
Governance centered on 24/7 operational maintenance and technical support workflows, including participation in SSCI implementation and ongoing system maintenance. Technical ownership focused on sustaining IBM Z/TPF OS runtime stability for passenger check-in, message throughput, and airport transaction integrity.
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Air Canada | Transportation | 37200 | $16.2B | Canada | IBM | IBM Z/TPF OS | Operating System (OS) | 2004 | n/a |
In 2004, Air Canada implemented IBM Z/TPF OS as its core Operating System (OS) to support high-volume transaction processing for airline operations. The IBM Z/TPF OS implementation established a mainframe-hosted transaction processing foundation under the IBM Z/TPF OS application name for mission critical booking and distribution workloads.
The IBM Z/TPF OS deployment was configured to support real-time reservation and ticketing workflows, high-throughput transaction processing, and sustained I/O and message handling typical of airline operations. Configuration work included transaction routing, online transaction monitoring, and batch interfaces for data exchange, aligning system capabilities with passenger service and back office transaction patterns. The IBM Z/TPF OS application was organized to prioritize throughput, resilience, and deterministic response for synchronous booking events.
Integrations evolved as part of the ongoing application lifecycle, with IBM delivery teams executing programs for Air Canada that included an Amadeus PSS Migration, MuleSoft integration work, loyalty system integration, the largest TPF upgrade, and IBM to Azure cloud migration. Those programs indicate the IBM Z/TPF OS estate was integrated with passenger service systems, middleware layers, loyalty platforms, and hybrid cloud targets to maintain end-to-end booking, distribution and loyalty interactions.
Operational governance for the IBM Z/TPF OS environment was maintained through multiyear managed services and program delivery, with IBM teams managing Projects and AMS teams of more than 200 practitioners and contracts referenced at approximately 150 million dollars for clients including Air Canada. Ongoing lifecycle activities focused on scheduled TPF upgrades, application modernization, and coordinated integration projects to sustain the IBM Z/TPF OS platform within Air Canadas transaction processing estate.
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Transportation | 78399 | $36.5B | France | IBM | IBM Z/TPF OS | Operating System (OS) | 2010 | n/a |
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Transportation | 11700 | $4.1B | New Zealand | IBM | IBM Z/TPF OS | Operating System (OS) | 2016 | n/a |
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Transportation | 30536 | $11.7B | United States | IBM | IBM Z/TPF OS | Operating System (OS) | 2010 | n/a |
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Transportation | 44109 | $15.4B | Japan | IBM | IBM Z/TPF OS | Operating System (OS) | 2009 | n/a |
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Transportation | 5991 | $2.5B | United States | IBM | IBM Z/TPF OS | Operating System (OS) | 2011 | n/a |
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Buyer Intent: Companies Evaluating IBM Z/TPF OS
ARTW Buyer Intent uncovers actionable customer signals, identifying software buyers actively evaluating IBM Z/TPF OS. Gain ongoing access to real-time prospects and uncover hidden opportunities. Companies Actively Evaluating IBM Z/TPF OS for Operating System (OS) include:
- NYPD Online, a United States based Government organization with 20 Employees
- Kyndryl, a United States based Professional Services company with 73000 Employees
- Atlas Copco, a Sweden based Professional Services organization with 52179 Employees
Discover Software Buyers actively Evaluating Enterprise Applications
| Logo | Company | Industry | Employees | Revenue | Country | Evaluated | ||
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FAQ - APPS RUN THE WORLD IBM Z/TPF OS Coverage
IBM Z/TPF OS is a Operating System (OS) solution from IBM.
Companies worldwide use IBM Z/TPF OS, from small firms to large enterprises across 21+ industries.
Organizations such as Walmart, Walgreens, Citigroup, American Express and Broadcom (inc. VmWare) are recorded users of
IBM Z/TPF OS for Operating System (OS).
Companies using IBM Z/TPF OS are most concentrated in Retail, Banking and Financial Services and Professional Services, with adoption spanning over 21 industries.
Companies using IBM Z/TPF OS are most concentrated in United States, with adoption tracked across 195 countries worldwide. This global distribution highlights the popularity of IBM Z/TPF OS across Americas, EMEA, and APAC.
Companies using IBM Z/TPF OS range from small businesses with 0-100 employees - 4%, to mid-sized firms with 101-1,000 employees - 8%, large organizations with 1,001-10,000 employees - 32%, and global enterprises with 10,000+ employees - 56%.
Customers of IBM Z/TPF OS include firms across all revenue levels — from $0-100M, to $101M-$1B, $1B-$10B, and $10B+ global corporations.
Contact APPS RUN THE WORLD to access the full verified IBM Z/TPF OS customer database with detailed Firmographics such as industry, geography, revenue, and employee breakdowns as well as key decision makers in charge of Operating System (OS).