MilitaryCAC's Places to purchase / information about / drivers for USB CAC readers
USB Smart Cart (CAC/PIV) Reader Plus USB 3.0 Hub for USB-C
Identiv uTrust 2700 R Contact Smart Card Reader
Amazon.com: USB Smart Card Reader, Rocketek DOD Military USB CAC Memory Card Reader Compatible with Windows, Linux/Unix, MacOS X - Build in SDHC/SDXC/SD Card Reader and Micro SD Card Reader : Electronics
CAC Smart Card Reader - DOD Military USB Common Access Card Adapter - Military/ID Card/IC Bank Chip Card Reader, USB Smart Card Writer - Compatible with Windows XP/Vista/8/10, Mac OS 10.6-10.14 -
Best Buy: Belkin USB Smart Card/CAC Reader Black F1DN008UTT
Saicoo FBA_S0201B-SSM saicoo DOD Military USB Common Access CAC Smart Card Reader, Compatible with Mac Os, Win (Horizontal Version)
SlimTouch™ 510R - Mini Keyboard with Smart Card Reader and USB Hubs - Adesso Inc ::: Your Input Device Specialist :::
Cherry TC1100 Stand Alone PCSC/EMV Contact Smart Card Reader Black Usb JT-0100WB-2 | CardMachineOutlet.com
Identiv SCR3310v2.0 USB Smart Card Reader : Electronics