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Differential Web Designs • 40-Year Software Archive
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Living Software Archive: Resurrected to PHP 8 + SQLite

Every legacy enterprise platform engineered by David Dombrowski over the past 40 yearsβ€”spanning healthcare LMS, multi-tenant eCommerce, industrial manufacturing simulators, and financial trade enginesβ€”has been extracted from vintage tape and IIS server backups on drives E: and F: and fully resurrected into modern, functional, interactive applications running on modern PHP 8 and zero-cost embedded SQLite.

1. Op-T-Soft & IBM Video Server Simulator
Era: 1993 - 1996 • Industrial CBT
Original: C/C++, Visual Basic, IBM Token-Ring Video Server, Smurfit $200M Mill Resurrected: PHP 8.2+ • SQLite (optsoft.db) • Concurrent Stream Monitor

David solved the industry dilemma of synchronizing real-time digital video, audio, text, and graphics in a single unified application. Retained for the $200M green-field Jefferson Smurfit paper mill, delivering SOP/SMOP training and demonstrating concurrent streaming for 100+ plant terminals over the 1996 IBM Video Server.

2. E-Medtrain.com
Era: 1994 - 2001 • Healthcare Education
Original: Classic ASP, VBScript, ADODB, MSSQL / Access (.mdb), IIS Resurrected: PHP 8.2+ • SQLite (emedtrain.db) • Cryptographic CEU Verification

Healthcare LMS and clinical remediation engine co-authored with John Jensen. Converted Lakeland Regional Medical Center's (LRMC) 10,000 instructional video tapes into an interactive delivery system with mandatory remedial review loops and verifiable CEU certification printing for LRMC, Morton Plant, and HCA hospitals.

3. E-Net.com ("Internet in a Box")
Era: 1998 - 2002 • Multi-Tenant Engine
Original: Classic ASP, DSN = "genesis", MSSQL Server, HTTP_HOST Routing Resurrected: PHP 8.2+ • SQLite (enet.db) • Dynamic Multi-Tenant Switcher

Dynamic database-driven template engine hosting hundreds of domains from a single codebase. Instantly spawned branded portals including enet-villas.com (luxury Orlando vacation villas near Disney), enet-cars.com (classic muscle cars), and enet-home.com with dynamic filtering and direct inquiry logging.

4. First Tech Source ("Interactive Developer")
Era: 1997 - 2001 • $500k Angel-Funded Studio
Original: Proprietary CBT Authoring Framework, Active Scripting, Media Pipeline Resurrected: PHP 8.2+ • SQLite (firsttechsource.db) • Interactive Node IDE

Founded in Orlando, FL by John Jensen and David Dombrowski with $500,000 in angel funding. Built the "Interactive Developer" IDE, directing PhD instructional designers and artists to assemble branching CBT courseware, synchronized audio cues, and automated course compilation without writing code.

5. First Source
Era: 1996 - 2003 • Technical Staffing Network
Original: Classic ASP, MSSQL Candidate Database, Automated Email Dispatch Resurrected: PHP 8.2+ • SQLite (firstsource.db) • Referral Bounty Ledger

B2B technical placement network developed for partner James Rasche. Allowed clients to search corporate vacancies and refer qualified engineering colleagues, populating candidate databases for years and automatically tracking referral bounties ($500 - $3,000) upon successful placement.

6. Taxfree.com / First Fortress Foundation
Era: 2000 - 2004 • Duty-Free & Asset Engine
Original: Dot-Com High Performance SEO, Direct Response TV/Radio Lead Funnel Resurrected: PHP 8.2+ • SQLite (taxfree.db) • Harmonized Tariff Math Engine

Online presence for First Fortress Foundation. Engineered to capture and qualify accredited investor leads driven by national television and radio ads, computing international Harmonized Tariff Schedule (HTS) duties, Foreign Trade Zone (FTZ) inverted tariff savings, and offshore statutory trust wealth preservation models.

7. Sherrod Conversion Vans
Era: 2005 - 2008 • National Dealer Portal
Original: National Dealership Inventory System, Tri-Brand Custom Floorplan Spec Resurrected: PHP 8.2+ • SQLite (sherrodvans.db) • Monroney Window Sticker Configurator

As National Sales Manager for Ford, Chevy GMC, and Dodge conversion divisions, David architected the digital portal for dealer principals nationwide to configure custom high-top luxury conversion vans, view wholesale floorplan inventory, and generate official Monroney window stickers.

8. PlanMyItinerary.com
Era: 2008 - 2012 • Interactive Travel Scheduler
Original: Adobe Flex / ActionScript 3, ColdFusion (MyPMI5), XML Data Feeds Resurrected: PHP 8.2+ • SQLite (planmyitinerary.db) • Daily Timeline & Budget Engine

Social travel scheduler and budget engine originally designed in Adobe Flash/ActionScript and ColdFusion under the MyPMI5 codebase. Enables groups of travel buddies to coordinate multi-day vacation timelines, lodging, flights, and dining reservations with real-time budget rebalancing.

9. UNF 1986 Computer Lab & AT&T UNIX 3B2 Terminal
Era: 1986 • UNIX & Token-Ring Networking
Original: AT&T 3B2/300 UNIX System V, IBM 4381 Mainframe, Novell Netware 286 Resurrected: PHP 8.2+ • SQLite (unf1986.db) • Interactive Phosphor CRT Simulator

Interactive simulation of the University of North Florida 1986 computer laboratory. Features David's authentic guest login trap script that impressed Lab Director Prof. Thomas Blakely, leading to David being hired on the spot and bridging standalone PCs to UNIX minicomputers via token-ring networking.