# cathartic.co

> AI-optimized mirror of cathartic.co containing 26 pages totalling 4,339 words of clean markdown content, structured data, and semantic HTML. Original source: https://cathartic.co/. Last updated: 2026-06-15T05:11:51.169Z.

Each page is available as HTML (with JSON-LD structured data) and Markdown (text-only, ideal for LLMs and RAG).

## Homepage

- [Home - Nelop Systems](/content/site-root.html): Nelop Systems delivers secure, reliable, and mission-critical technology solutions. We specialise in managing, modernising, and supporting complex IT environments, from legacy platforms to high-performance computing. Ensuring business continuity, compliance, and operational resilience. (234 words)

## Articles & Blog Posts

- [Avoid Security Issues by Air Gapping Legacy Systems](/content/air-gapping-legacy-systems/index.html): Air gapping can protect legacy systems by isolating them from external threats. But isolation brings its own risks. Learn how to manage tamper, data transfer, and physical security challenges. (157 words)
- [Why Windows XP Still Exists in 2025 & the Risks It Poses | Nelop](/content/why-windows-xp-is-still-in-use-in-2025-and-the-risks-it-carries.html): Explore why organisations still run Windows XP in 2025, its major risks—security gaps, compliance issues, maintenance cost—and ways to manage it safely. (157 words)
- [Legacy Systems: Keeping Mission-Critical IT Alive](/content/legacy-systems-critical-it/index.html): Learn how to keep your mission-critical legacy IT systems alive, secure, and compliant with practical tips from 25 years of enterprise IT experience. (157 words)
- [The Hidden Cost of Maintaining Legacy Systems](/content/hidden-cost-maintaining-legacy-systems-fix/index.html): Legacy systems drive up costs for support, spare parts, and staffing. Learn practical steps to fix outdated IT without risking downtime. (157 words)
- [Hospital Digital Transformation: Why Legacy Systems Still Matter](/content/hospital-digital-transformation-legacy-systems/index.html): Hospitals can’t modernise safely without protecting legacy systems. Learn how stabilising non-replaceable technology reduces downtime and supports digital transformation. (157 words)
- [Legacy Systems & Compliance: Why Age Doesn’t Matter - Nelop Systems](/content/legacy-systems-compliance-why-age-doesnt-matter/index.html): Discover why even older IT systems can still meet compliance standards. Learn best practices for legacy‑infrastructure compliance in critical industries. (157 words)
- [Run COBOL on Linux – Mainframe Alternative | Legacy Systems](/content/cobol-on-linux/index.html): Migrate COBOL applications from mainframes to Linux. Lower costs, improve flexibility, and future-proof your critical systems. (157 words)
- [DOS & OS/2 Application Support – Nelop Systems](/content/dos-os-2-applications/index.html): Nelop Systems preserves, virtualises, and emulates DOS & OS/2 applications. Keep critical tools running without rewriting or losing functionality. (157 words)
- [Hardware Replacement for Legacy Systems | Nelop Systems](/content/hardware-replacement/index.html): Ageing hardware is a major risk to legacy systems. Nelop Systems replaces failing boards, storage, and controllers to prevent downtime and catastrophic failure. (157 words)
- [How We Migrate Mission-Critical XP Systems Without Downtime | Nelop](/content/how-we-safely-migrate-mission-critical-xp-systems-without-downtime.html): Learn how Nelop safely migrates mission-critical Windows XP systems to modern platforms without downtime, using isolation, hardware replication, incremental transition, and compliance built in. (157 words)
- [Legacy UNIX Systems Support & Migration – Nelop Systems](/content/legacy-unix-systems/index.html): Support for AIX, Solaris, and HP-UX. Nelop Systems provides maintenance, hardware replacement, and migration planning for legacy UNIX workloads. (157 words)
- [Windows XP Migration & Legacy IT Support | Nelop Systems](/content/legacy-system-support-uk/index.html): Keep Windows XP systems alive. Nelop Systems migrates XP to modern hardware or VMs. UK on-site service for manufacturing, NHS, aerospace & more. (157 words)
- [Air-Gapped System Security for Legacy IT | Nelop Systems](/content/air-gapped-system-security/index.html): Protect isolated legacy systems with Nelop Systems. We deliver hardened security, monitoring, and maintenance for air-gapped environments without internet exposure. (157 words)
- [Regulatory Compliance for Legacy IT Systems | Nelop Systems](/content/regulatory-compliance/index.html): Legacy IT systems can fall out of compliance. Nelop Systems audits, documents, and guides you to meet healthcare, finance, and defence regulations—even without vendor support. (157 words)
- [How to Hypothetically Secure $1 Billion in Bitcoin - Nelop Systems](/content/secure-1-billion-bitcoin/index.html): Explore a hypothetical method to securely store and transact $1 billion in Bitcoin using air-gapped networks, data diodes, and PSBTs, while maintaining full control of your assets. (157 words)
- [Air-gapped Networks](/content/category/legacy-systems/index.html): Explore articles on maintaining, migrating or securing legacy IT infrastructure — from XP‑era systems to air‑gapped network design and compliance in critical industries. (285 words)
- [Technical Storage and Access](/content/category/tech/index.html) (205 words)
- [author/neil_nelop_com/index.html](/content/author/neil_nelop_com/index.html) (1 words)
- [The problem of trust when no one fully understands the system](/content/problem-of-trust-in-unknown-systems/index.html): Complex systems can outlive their creators, leaving teams responsible for technology they do not fully understand. This post explores how trust replaces knowledge, how risk quietly accumulates, and why communication up the chain is essential. (157 words)
- [LattePanda IoTA: Red Hat 10 Enterprise Edge Computing Solution](/content/lattepanda-iota-edge-compute-node/index.html): Discover how the LattePanda IoTA, powered by an Intel N150 and running Red Hat 10, delivers flexible, low-power, and enterprise-ready edge computing. Ideal for VMs, containers, and legacy applications. (157 words)
- [Nelop Systems Blog](/content/blog/index.html): Stay updated with practical insights on secure system design, air-gapped networks, legacy infrastructure support, and bespoke technical solutions from Nelop Systems. Real-world engineering, simple explanations, and useful knowledge for organisations running critical systems. (317 words)
- [Creating a Bespoke Data Diode for Air Gapped Networks - Nelop Systems](/content/bespoke-data-diode-airgap/index.html): Learn how we developed a data diode using Raspberry Pi and opto couplers to extract syslog information from air-gapped networks. (157 words)
- [Legacy Systems Support UK – Nelop Systems](/content/legacy-systems/index.html): Preserve, migrate or maintain your mission-critical legacy systems. XP, COBOL, UNIX, hardware, compliance – Nelop Systems keeps you running. (157 words)
- [Venture Studio for Enterprise Innovation](/content/venture-studio/index.html): Partner with our Venture Studio to explore solutions to your business challenges. We help you package problems into tech solutions internally or spin up startups to address them. (157 words)
- [Privacy Policy - Nelop Systems](/content/privacy-policy/index.html): Learn how Nelop Systems handles your data — privacy, cookies, compliance and user rights explained. (157 words)

## Resources

- [Full Page Index](/index.html): Browse all cached pages with rich metadata
- [About This Cache](/content/about.html): Methodology, technical details, and usage guidelines
- [XML Sitemap](/sitemap.xml): Machine-readable sitemap for crawler discovery
- [Robots.txt](/robots.txt): Crawler directives