| Accesser | | Specializes in industrial computers, single board computer, backplane, rackmount chassis, and custom integration of computer systems. |
| Acnodes Corp. | | Manufactures a line of industrial computer solutions that include panel PC, LCD workstations, rack mount LCD monitors and LCD keyboard drawers. |
| Actac Technology Corp. | | Providing industrial computer solutions includes embedded board, SBC, panel PC and workstation. |
| Actis Computer | | Specializing in small size, low power consumption, extended temperature range, Single Board Computers and I/O modules for industrial embedded applications. With standard or custom products designed around the 32-bit 68k, Pentium and PowerPC processor families. |
| Acura Embedded Systems | | Industrial computers for mobile trucks crane where less space and high performance is required. |
| Add-On Data | | Offers a total range of IPC rackmount unit solutions to industrial applications with rugged construction. Resistant to dust, temperature, shock, vibration and EMI common on factory floors. |
| Adek Industrial Computers | | Manufactures industrial computers to customer specifications and provides OEMs with custom-built computers. |
| Advantech | | Offers industrial I/O and software solutions as well as computing platforms, board computers and industrial peripherals. |
| Aicsys | | Manufacturers of chassis, Single Board Computer (SBC) servers and systems. |
| Aitech Defense Systems Inc. | | Provides rugged computer system solutions and integration services for the defense and space electronics, as well as telecom industries. |
| Ajax Systems Corp. | | Manufactures and delivers a full line of Industrial rack Computer solutions that enhance and optimize user work performance. |
| Animal Systems | | UK based designer and manufacturer of industrial servers and embedded motherboars. |
| AP Labs | | Builds and integrates rugged enclosures and real-time COTS systems. Lab, submarine, ship, aircraft, vehicles. Hard mount, rack mount, ATR. |
| APC Technology | | Manufacturer of industrial computers, rugged computers, defence computers, and custom hardware solutions. |
| Arbor Technology | | Manufacturer of industrial pc-based automation products, including single board computers, pc/104 modules, embedded chassis and 19" rackmount servers. |
| Arcom | | manufacturers of PC/104, embedded PC, single board computer and industrial network gateway products. |
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