Teardown of New 21.5-inch iMac Reveals Glued Down LCD and Dual Microphones - MacRumors
Review: 21.5-inch 2012 iMac takes two steps forward, one step back | Ars Technica
A-Tech 32GB Kit (4x8GB) RAM for Apple iMac (Late 2012, Late 2013, Late 2014, Mid 2015) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
CMS 32GB (4X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core I7 3.4 27-Inch (Late 2012) - A6 at Amazon.com
Apple 21.5" iMac Late 2012 - Catalina, 1TB HDD, Intel i5 2.9GHz, 8GB RAM | eBay
Apple iMac 27" - Late 2012 Reviews, Pros and Cons | TechSpot
Which RAM to buy for iMac 27-inch Late 2012? | MacRumors Forums
The Case of the Late-2012 iMacs - MacStories
iMac (Late 2012) | Low End Mac
Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Mac Book Pro(Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM at Amazon.com