Dell OptiPlex 7040 (6th Gen)

OptiPlex 7040 SFF
Intel i5 (6th Generation CPU)
8GB DDR3 / 240-256 GB Solid State Storage
4 External USB 3.0 ports (2 front, 2 rear) and 6 External USB 2.0 port
Lifetime Parts Replacement Warranty

Dell OptiPlex 9020 (4th Gen)

OptiPlex 9020 SFF 
 Intel (i5-4570 or i7-4790) 3.4GHz 
8GB DDR3 Memory / 250-320GB
 SATA Hard Drive / DVD
New Keyboard/Mouse / Windows 10 Pro
Lifetime Parts Replacement Warranty

Latitude e5440 i3 (4th Gen)

Latitude E5440
Intel Core i5 4200u 4th Generation
1.6-2.9GHz / 8GB DDR3-L SDRAM
250-320GB SATA Hard Drive / DVD
Lifetime Parts Replacement Warranty

Latitude e7470 i5-6200u

Latitude E7470
Intel Core i5-6200u (or 6300u) 6th Generation
8GB DDR4 Memory / 256GB M.2 Solid
State Drive / 14' HD Anti-Glare Screen
Lifetime Parts Replacement Warranty