StarTech.com 4 Port DisplayPort KVM Switch, 4K 60Hz, Single Display, Dual Port UHD DP 1.2 USB KVM Switch with Integrated USB 2.0 Hub and Audio, Dell, HP, Apple, Lenovo, TAA Compliant - Keyboard/Video/Mouse Switch (SV431DPUA2) - KVM / audio switch - 4...
Lenovo Unified Pairing - wireless mouse / keyboard receiver - USB
Connect a supported PS/2 keyboard to the USB port on your computer. The GC46MFKEY PS/2 Keyboard to USB Adapter features a USB-A male connector and a 6-pin (PS/2) female port, allowing you to connect a PS/2 keyboard to a computer through a USB port.
Dell Universal Pairing Receiver WR221 - wireless mouse / keyboard receiver - USB, RF 2.4 GHz
Apple Mac Studio - USFF - M2 Max - 32 GB - SSD 512 GB