Houston's web development demand concentrates in energy, healthcare, aerospace, and shipping and logistics. Energy: Houston's energy sector is vast and digitally transforming. ExxonMobil ($413 billion revenue), ConocoPhillips ($59 billion), Phillips 66 ($150 billion), Halliburton ($23 billion), and Schlumberger/SLB ($33 billion) represent just the largest companies in a cluster of 4,600+. Web applications: production monitoring dashboards (real-time data from sensors on offshore platforms, onshore wells, pipelines, and processing facilities — displaying production rates, pressures, temperatures, and equipment status for operations teams), HSSE platforms (Health, Safety, Security, Environment — incident reporting, permit-to-work management, safety observation tracking, compliance monitoring — critical for an industry where safety failures can be catastrophic), asset management portals (managing billions of dollars in physical assets — maintenance scheduling, inspection tracking, equipment lifecycle management, and capital project portfolio dashboards), trading and risk management interfaces (energy trading — crude oil, natural gas, refined products, power, and emissions — requires web dashboards for position monitoring, P&L tracking, risk analytics, and regulatory reporting to FERC and CFTC), and energy transition platforms (Houston's energy companies are investing billions in renewable energy, carbon capture, and hydrogen — new web applications for renewable asset monitoring, carbon credit tracking, and ESG reporting). Healthcare — Texas Medical Center: the TMC is the largest medical complex on earth: 106,000 employees, 10 million annual patient encounters, and institutions including MD Anderson Cancer Center (the #1-ranked cancer centre), Houston Methodist, Memorial Hermann, Texas Children's Hospital, and Baylor College of Medicine. Web applications: patient portals (appointment scheduling, medical records, lab results, bill pay — HIPAA-compliant, often integrating with Epic or Cerner), clinical trial platforms (MD Anderson alone conducts 1,400+ active clinical trials — recruitment, enrollment, and management platforms), research collaboration tools (multi-institution research across TMC requires secure data sharing platforms with appropriate access controls), telehealth platforms (Texas adopted broad telehealth policies — platforms for video visits, remote monitoring, and asynchronous consultation), and health system marketing (major hospitals compete nationally for patients — websites must serve patients, physicians, researchers, students, and donors). Aerospace: NASA's Johnson Space Center (JSC) has been the home of human spaceflight since 1961 — Mission Control, astronaut training, and spacecraft operations are managed from Houston. Commercial space companies are growing: Intuitive Machines (lunar landers), Axiom Space (commercial space station), and Nanoracks. Web applications: mission operations dashboards (displaying real-time telemetry, crew communications, system status — the modern web equivalent of Mission Control displays), engineering collaboration platforms (spacecraft design involves thousands of engineers across multiple contractors — web platforms for design review, requirements management, and test documentation), and commercial space customer platforms (Axiom Space is selling tickets for commercial space station visits — web platforms for customer engagement, training scheduling, and mission planning). Shipping and logistics: the Port of Houston is the largest port in the US by foreign tonnage — $425 billion in trade annually. Web applications: port operations dashboards (vessel scheduling, berth management, cargo tracking), supply chain visibility platforms (tracking goods from origin through Houston port to final destination), and customs and compliance portals (import/export documentation, tariff management, USCBP compliance).