USB Reference
USB Alternatives
USB alternatives include wired, wireless, display, storage, networking, and legacy technologies that can replace or complement USB connections.
Related: USB Adapters · USB Connectors · USB Standards
Compare USB alternatives
Compare current, legacy, and specialized technologies that overlap with USB for displays, networking, storage, peripherals, charging, and device connectivity.
| Technology | Category | Primary use | USB overlap | Current relevance |
|---|---|---|---|---|
| Thunderbolt | High-speed peripheral interconnect | Docks, displays, storage, and demanding peripherals | Strong overlap with high-end USB-C and USB4 peripheral use | Current |
| DisplayPort | Display | Monitors and audiovisual output | USB-C display output, docks, and adapters | Current |
| HDMI | Display | Displays, televisions, and audiovisual equipment | USB-C display output, docks, and adapters | Current |
| Bluetooth | Wireless peripheral | Input devices, audio, and accessories | Replaces USB cables for many peripheral and audio connections | Current |
| Wi-Fi | Networking | Network access and networked devices | Can replace direct USB data links for network-capable devices | Current |
| Ethernet | Networking | Wired network access | USB network adapters bridge computers and devices to Ethernet | Current |
| Lightning | Mobile connector | Apple mobile devices and accessories | Charging, data, and accessory connection overlapping with USB-C | Existing-device compatibility |
| SD Cards | Removable storage | Cameras, computers, and portable storage | Alternative to USB flash storage; USB card readers bridge both | Current |
| PCIe | Internal expansion | High-performance storage, graphics, networking, capture, and expansion | Internal alternative to many external USB expansion devices | Current |
Sources: Intel Thunderbolt technology overview, VESA About DisplayPort, HDMI specifications and programs, Bluetooth SIG technology overview, Wi-Fi Alliance Discover Wi-Fi, Ethernet Alliance Ethernet Roadmap, Apple Lightning connector guidance, SD Association standard overview, and PCI-SIG PCI Express Base.
Legacy and specialized alternatives
| Technology | Category | Primary use | USB overlap | Current relevance |
|---|---|---|---|---|
| FireWire | Legacy peripheral interconnect | Audio, video, storage, and peripherals | Legacy general-purpose peripheral bus once competing with USB | Legacy |
| SCSI | Storage / peripheral command architecture | Drives, scanners, storage systems, and modern UAS storage | Classic external SCSI competed with USB; USB Attached SCSI now carries SCSI commands over USB | Legacy ports; current command architecture |
| eSATA | Legacy storage | External direct-attached storage | External-storage alternative to USB | Legacy or niche |
| DVI | Legacy display | Computer displays | USB display adapters and docks can provide DVI output | Legacy |
| VGA | Legacy display | Analog computer displays | USB display adapters and docks can provide VGA output | Legacy |
| PS/2 | Legacy peripheral | Keyboards and mice | Legacy alternative for computer input devices | Legacy or specialized |
| Apple Desktop Bus | Legacy Apple peripheral | Keyboards, mice, and low-speed Macintosh peripherals | USB replaced ADB on later Apple computers | Legacy |
| IrDA | Legacy wireless peripheral | Line-of-sight file transfer, printing, synchronization, and point-to-point links | Wireless alternative to cable connections for older computers and peripherals | Legacy |
| Serial Ports | Legacy / industrial peripheral | Consoles, control, instrumentation, and industrial communication | USB-to-serial adapters bridge modern computers to serial equipment | Legacy or specialized |
| Parallel Ports | Legacy peripheral | Printers and older PC peripherals | USB replaced most general consumer parallel-port uses | Legacy |
Sources: Apple Hardware Families documentation, T10 SCSI standards list, SATA-IO eSATA resources, VESA DisplayPort legacy-adapter guidance, and Apple I/O Kit ADB family reference.
USB alternative articles
Explore articles about connecting USB with display, networking, wireless, storage, and legacy interfaces, plus practical compatibility and adapter questions.
