1 PC 2519N Signetics Gray Shift Register for Apple 1 Same as 2519b for sale online | eBay
Shift Registers: How Do They Work? : 5 Steps (with Pictures) - Instructables
Inside the Apple-1's shift-register memory
SB-Projects - Projects - Apple 1 - Terminal
Amazon.com: StarTech.com 2m (6ft) Long White Apple 8-pin Lightning Connector to USB Cable for iPhone / iPod / iPad - Charge and Sync Cable (USBLT2MW) : Electronics
Using a Shift Register to Control Multiple LEDs | Onion Omega2 Starter Kit
SmartyKitⓇ computer kit on Twitter: "Great post by @kenshirriff on Apple-1's video memory – right to the silicon! Memory used 2504V shift registers instead of DRAM to make it cheaper: 6 chips
Inside the Apple-1's shift-register memory
Universal Shift Register in Digital logic - GeeksforGeeks
Inside the Apple-1's shift-register memory
Getting More I/O Pins on ATTiny With Shift Registers : 6 Steps (with Pictures) - Instructables