Honeywell is a diversified industrial conglomerate selling automation systems, building controls, aerospace components, and process technology to commercial and industrial customers globally. The company is in the midst of a major portfolio transformation — splitting into multiple independent public companies — that will significantly reshape its structure. Aerospace Technologies (~47% of revenue) makes avionics, auxiliary power units, propulsion engines, navigation and flight safety systems, wheels and brakes, and satellite communications, selling to OEMs like Boeing and Airbus during aircraft production and to airlines through a high-margin aftermarket business covering parts, repair, and overhaul. Industrial Automation (~25% of revenue) sells process automation, sensing and measurement products, and warehouse automation systems, though Honeywell is actively divesting parts of this segment. Building Automation (~20% of revenue) sells building management systems, fire and security products, and access control, with particular strength in data centers, healthcare, and hospitality. Energy and Sustainability Solutions (~8% of revenue) is primarily UOP, which licenses proprietary refining and petrochemical process technology and sells catalysts globally. Honeywell's business model spans hardware product sales, large-scale project installations, recurring aftermarket services, and technology licensing. The highest-quality revenue comes from aftermarket and services — recurring, sticky, and higher-margin. Honeywell's long-term strategy centers on converting its large installed base of connected buildings and process plants into recurring software and analytics revenue through its Honeywell Forge IoT platform, while also shifting the portfolio toward higher-growth verticals like data centers, LNG, life sciences, and defense.