Enterprise Software & Bespoke Services on the Z & I.
System/77 bridges mission-critical legacy ledgers and modern computing. We engineer flagship systems software like AnikaZEE Terminal (dual TN3270 & TN5250) alongside high-assurance bespoke services for zSeries & iSeries modernization, custom systems development, and legacy code remediation (COBOL, HLASM, PL/I, RPG, REXX).
AnikaZEE Terminal: High-performance dual TN3270/TN5250 emulator, drop-in PCOMM EHLLAPI parity, and audited human-in-the-loop AI with Personal Data Shield.
Modernization & Code Updates: z/OS Connect REST APIs, Kafka streaming, CICS/IMS systems, and legacy remediation for COBOL, HLASM, PL/I, RPG, and REXX.
The Mainframe Terminal Re-Engineered.
AnikaZEE running on Windows and macOS: authentic 21-tool PCOMM action bar, dual TN3270 & TN5250 engines, operator-guarded AI assistant, and built-in host LSP code editing.
Ask about what is on the screen, for example:
Mainframe & Midrange Engineering Services
We partner with global financial institutions, insurance carriers, and logistics conglomerates to extend, secure, and modernize their most valuable software assets.
zSeries & iSeries Modernization
Seamlessly connect your foundational systems of record with cloud architectures, event streaming networks, and modern developer toolchains.
- REST & OpenAPI 3.0: z/OS Connect EE & IBM i Integrated Web Services (IWS).
- Event Streaming: Apache Kafka & IBM MQ integration for real-time cloud data pipelines.
- Db2 Normalization: DDL migration from physical/logical files to relational Db2.
- DevSecOps: Git, IBM DBB, and Ansible automation on z/OS.
Custom Systems Development on Z & I
We engineer bespoke, high-throughput transactional applications natively inside z/OS and IBM i runtime environments.
- CICS & IMS Systems: Sub-millisecond transaction routing, Channels & Containers architecture.
- Modular ILE RPG: Service programs (*SRVPGM), named activation groups, and subprocedures.
- USS & PASE Services: High-performance C++, Rust, and Python daemons running on mainframe cores.
- Systems & Security: APF-authorized exits, SMF telemetry collectors, RACF/ACF2 hooks.
Legacy Code Updates & Remediation
Safely renovate, optimize, and modularize your legacy business logic with automated validation and mathematically proven semantic equivalence.
- COBOL: v4 to v6+ migrations, ARCH(13/14) vector tuning, native JSON/XML support.
- HLASM: 24/31 to 64-bit AMODE expansion, macro refactoring, instruction tuning.
- PL/I: Enterprise PL/I upgrades, dynamic storage tuning, memory alignment.
- RPG: Columnar RPG II/III to free-form **FREE ILE RPG and embedded SQL.
- REXX: TSO/E, ISPF, and SDSF automation modernized or bridged to Python/Ansible.
Language Specialization: COBOL, HLASM, PL/I, RPG & REXX
RPG II/III/IV to **FREE ILE RPG
- ▹ Elimination of cryptic numbered indicators (*IN01 - *IN99)
- ▹ Modern **FREE syntax readable by contemporary engineers
- ▹ Embedded SQL (EXEC SQL) replacing legacy CHAIN/SETLL
- ▹ Modular service programs (*SRVPGM) with parameter passing
// Before: Archaic Fixed-Column RPG III
C CUSTID CHAIN CUSTREC 50
C N50 MOVE BALDUE OUTBAL
// After: Modern Free-Form ILE RPG
**FREE
exec sql select balance_due into :outBalance
from customer_master
where customer_id = :custId;Need bespoke engineering on your core IBM Z or IBM i estate?
Our senior systems architects conduct deep-dive codebase audits, modernization roadmaps, and non-disruptive migration execution.
Sustaining the World's Core Compute Ledgers
Over 70% of the world’s Fortune 500 transactions, core banking ledgers, and insurance claims run on IBM z/OS mainframes and IBM i midrange systems. System/77 delivers the technology to sustain and modernize these mission-critical systems.
At System/77, we address both sides of enterprise core systems: As a Software Creator, we engineer high-performance native tools like AnikaZEE Terminal (dual TN3270 & TN5250) built with Rust, Slint, and audited local AI. As a Bespoke Services Provider, our senior systems architects modernize core architectures, design CICS/IMS/ILE systems, and update legacy COBOL, HLASM, PL/I, RPG, and REXX codebases with guaranteed mathematical equivalence.
Native Rust & Slint desktop software: AnikaZEE dual TN3270/5250, PCOMM EHLLAPI drop-in parity, and Personal Data Shield.
Exposing mainframe transactions via z/OS Connect REST APIs, Kafka streaming, Db2 DDL evolution, and Git DevSecOps.
High-concurrency CICS Channels & Containers, IMS subsystems, modular ILE RPG service programs, and APF system exits.
Enterprise COBOL v4→v6+ with ARCH(14), HLASM 64-bit AMODE, Enterprise PL/I upgrades, columnar RPG to **FREE, and z/OS REXX automation.
Engineered for Banking & Mission-Critical Infrastructure.
System/77 builds software that honors 40 years of mainframe reliability while delivering state-of-the-art developer ergonomics.
Dual TN3270 & TN5250 Enterprise Core
RFC 1576/2355 (TN3270/E for IBM z/OS) & RFC 1205/2877/4777 (TN5250/E for IBM i & AS/400). Native support for IBM-3278/79 (Models 2–5) and IBM-3179-2/IBM-3477-FC (24x80 to 27x132 colour).
- z/OS (SDSF, TSO, ISPF, CICS) & IBM i (WRKACTJOB, CL, RPG, OS/400) sessions side-by-side
- 5250 Write Structured Field (WDSF), subfile controls, Field Exit & ATTN keys
- RFC 4777 password substitution (IBMRSEED / IBMWSBPM) auto-signon
- Tabs, split-screen (side-by-side, 2x2 up to 3x3), IND$FILE & PDF print exporter
Agentic Mainframe AI Assistant
A dedicated side drawer that explains mainframe screens, diagnoses abends, and safely drives host sessions under explicit human operator oversight.
- Three execution modes: Ask (read-only), Edit (approves key-by-key), Auto
- Works with Anthropic, OpenAI, Azure, Gemini, Ollama & LM Studio
- Message Doctor underlines z/OS error codes with immediate fix actions
- Operator skills for SDSF job output, ISPF 3.4 datasets, and CEMT
Personal Data Shield & Policy Control
Built specifically for banking, government, and financial compliance. Ensures private user data never reaches external AI models or logs.
- Automatic regex masking for SSNs, credit card numbers, IBANs, e-mails
- Custom corporate regex pattern definitions
- Windows Registry (HKLM) & macOS MDM profile administrative lockouts
- Audit log trace and daily assistant token cap enforcement
Mainframe LSP Language Service
Built-in code editor for members and sequential datasets fetched directly from z/OS hosts, with full conflict checking before writing back changes.
- Built-in LSP client for host-connected language servers (COBOL, HLASM, JCL, PL/I, RPG)
- Semantic syntax highlighting, symbol navigation, and real-time diagnostic squiggles
- Member conflict detection before host dataset overwrites
- Local scratchpad and host file synchronization
EHLLAPI & MCP Automation Engine
Preserve your existing enterprise screen-scraping investments while adding next-generation Model Context Protocol automation for AI orchestration.
- Drop-in 64-bit hllapi.dll supporting standard IBM PCOMM functions
- Built-in Model Context Protocol (MCP) server for modern AI agent integrations
- Automated screen scraping and keystroke playback with operator speed controls
- Export session recordings to automated testing scripts
Enterprise PKI & Data Sovereignty
Smart card-enabled, banking-certified TLS encryption, secret security, and robust corporate proxy support.
- TLS 1.3 with client certificate authentication (CAC / PIV / Smart Card)
- Enterprise proxy traversal (SOCKS5, HTTP Connect) with Kerberos/SPNEGO
- Local-only execution with zero telemetry data egress
- FIPS 140-2 validated cryptographic modules
Built for Financial Institutions & Strict Governance.
System/77 designs AnikaZEE with zero-compromise security defaults. Bank security teams retain complete control over AI capabilities through central OS policy deployment.
Automatic regex masking replaces credit card numbers, SSNs, IBANs, and custom corporate patterns with placeholders before reaching any model.
Managed via Windows Registry (HKLM\Software\Policies) or macOS MDM profiles (.mobileconfig).
Connect to internal enterprise LLM gateways, Azure OpenAI private endpoints, or local Ollama / LM Studio runtimes.
Full wire traces, session logs, and key approval history stored locally for forensic auditing and regulatory reporting.
Windows & macOS Enterprise Parity.
Built with native system integrations for 64-bit Windows 10/11 and macOS 11+ (Apple Silicon & Intel).
| Feature / Capability | Windows (64-bit) | macOS (macOS 11+) |
|---|---|---|
| Host Protocols & Systems | IBM z/OS (TN3270/E) & IBM i AS/400 (TN5250/E) | IBM z/OS (TN3270/E) & IBM i AS/400 (TN5250/E) |
| Installer & Packaging | MSI (per-machine administrator install) | AnikaZEE.app (Notarized DMG image) |
| Terminal & Session Layouts | Tabs, split-screen (2x2 to 3x3), popped-out windows | Tabs, split-screen (2x2 to 3x3), popped-out windows |
| Keyboard Chords & Maps | Ctrl, Alt, Shift chords; PF1-PF24 on F1-F24 | ⌘ for Ctrl, ⌥ for Alt; ⌘1..= & ⌥⌘ for PF keys |
| TLS & Encryption Engine | TLS 1.0 to 1.3 via Windows Schannel | TLS 1.0 to 1.3 via macOS Secure Transport |
| Smart Cards & PKI Store | Windows Certificate Store (CAC/PIV included) | macOS Keychains (Smart cards included) |
| Secrets & API Key Security | Windows Credential Manager | macOS Login Keychain |
| Print & PDF Exports | Windows native print dialog & 132-col PDF save | Sent via lp or opened in Preview; PDF save |
| Terminal Font Catalogue | Consolas, bundled Cascadia Mono | Menlo, bundled Cascadia Mono |
| Desktop Shortcut Engine | .lnk workspace shortcuts | Desktop app bundle shortcut |
| EHLLAPI API (hllapi.dll) | ✓ 64-bit PCOMM / WHLLAPI support | Not offered |
| MCP Server (anikazee-mcp) | ✓ Stdio pipe with local tokens | ✓ Stdio pipe with local tokens |
| CLI Headless Runner | anikazee-cli.exe | anikazee-cli |
| AI Assistant & Data Shield | ✓ On-screen regex masking & local LLM | ✓ On-screen regex masking & local LLM |
| Administrator Governance | Windows Registry (HKLM Policy lockout) | macOS Managed Preference (.mobileconfig) |
Modernize Your Core Systems With Confidence.
Schedule an executive technical consultation or request an enterprise pilot license for AnikaZEE Terminal.