| 1 | Single-Board Computer | Credit-card to 3.5-inch board; approximately 85 × 56 mm to 146 × 102 mm | 3–25 W | 0–70°C for commercial designs; wider ranges available | USB, HDMI or DisplayPort, Ethernet, GPIO, M.2 or mini PCIe, serial interfaces | IoT gateways, instrumentation, robotics, digital signage, laboratory equipment | Low cost and easy to integrate; usually offers less mechanical protection and expansion than enclosed systems. |
| 2 | Computer-on-Module | Module commonly sized around 82 × 50 mm, 95 × 95 mm, or similar standards | 2–30 W | 0–60°C or −40–85°C, depending on module and memory | High-speed board-to-board connectors, PCIe, USB, Ethernet, display, serial interfaces | Custom products, medical instruments, vehicle electronics, industrial controllers | Very compact and reusable across product families; requires a carrier board and more engineering work. |
| 3 | Fanless Box Computer | Small sealed enclosure; typically 120–250 mm wide and 30–80 mm high | 6–45 W | −20–70°C; industrial versions may support −40–85°C | Gigabit Ethernet, USB, HDMI or DisplayPort, serial ports, digital I/O, wireless expansion | Factory automation, kiosks, transportation, building controls, edge gateways | Quiet, dust-resistant, and easy to mount; passive cooling limits peak processor performance. |
| 4 | DIN-Rail Embedded Computer | DIN-rail enclosure; commonly 45–150 mm wide and 90–150 mm high | 5–35 W | −20–70°C; selected industrial units support −40–70°C or higher | Ethernet, RS-232/422/485, CAN, digital I/O, USB, isolated interfaces | Control cabinets, energy systems, railway equipment, building automation, remote monitoring | Uses standard 35 mm DIN rail and minimizes cabinet footprint; width and connector access can restrict expansion. |
| 5 | Industrial Panel PC | Front-mounted display computer; approximately 7–24-inch display sizes | 15–80 W | 0–50°C or −20–60°C for industrial models | Projected capacitive touch, Ethernet, USB, serial ports, digital I/O, display outputs | Human-machine interfaces, production lines, warehouse terminals, process visualization | Combines computing and operator display in one cutout; larger front dimensions reduce available mounting space. |
| 6 | Rugged Embedded Computer | Reinforced compact enclosure; commonly 150–300 mm long | 15–100 W | −40–85°C in extended-temperature configurations | Ethernet, USB, serial, CAN, isolated I/O, storage bays, wireless connectivity | Outdoor monitoring, mobile equipment, transportation, defense-related and harsh industrial systems | Resists shock, vibration, dust, and temperature extremes; costs more and may weigh more than standard units. |
| 7 | Industrial 3.5-Inch Single-Board Computer | Standard 3.5-inch board; approximately 146 × 102 mm | 6–35 W | 0–60°C; industrial configurations may support −40–85°C | SATA, M.2, dual Ethernet, USB, serial ports, GPIO, LVDS or eDP | Industrial controllers, medical devices, machine vision, compact gateways | A balance of standardized size, I/O, and serviceability; less compact than compute modules or credit-card boards. |
| 8 | Edge AI Embedded Computer | Compact box or board; commonly 100–250 mm long | 10–100 W | 0–50°C; rugged options may support −20–70°C | Camera inputs, USB, Ethernet, M.2 or mini PCIe, GPIO, display outputs | Vision inspection, predictive maintenance, robotics, smart retail, traffic analytics | Processes sensor and vision data locally with low latency; higher heat output and software optimization requirements are common. |
| 9 | Vehicle-Mounted Embedded Computer | Compact sealed enclosure; commonly 150–300 mm long | 10–75 W | −30–70°C; vehicle-qualified designs may use wider ranges | CAN bus, Ethernet, serial ports, isolated I/O, GNSS, cellular, ignition sensing | Fleet management, mobile mapping, agricultural machinery, public transport, logistics | Designed for vibration, variable DC input, and mobile installations; power transients and vehicle certification require careful design. |
| 10 | Microcontroller-Based Embedded Computer | Small module or custom PCB; often below 100 × 100 mm | Below 1–10 W | −40–85°C is common for industrial-grade components | GPIO, ADC, PWM, UART, SPI, I²C, CAN, low-power wireless interfaces | Sensors, actuators, smart meters, wearable equipment, battery-powered devices | Extremely low power, fast startup, and minimal board area; limited memory and processing capability compared with Linux-based systems. |
