Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel Q370 Processors: Intel Core i3, i5 9th Gen Memory Support: 16 GB (1 module(s) 16 GB) DDR4, unbuffered, non-ECC, 2,666 MT/s, UDIMM Hard Drive: HDD, SSD or SSD M2 Removable Media: Optional Expansion Bays: 1 x 2.5-inch bays, 1 x 3.5-inch internal bays, 1 x 5.25-inch external bays Expansion Slots: PCI-Express 3.0 x4 (mech. x16) , PCI-Express 3.0 x16 Graphics: Intel HD Graphics 630 Audio: Realtek ALC671 Communications: Gigabit Ethernet I/O Ports: 6 x USB 2.0, 4 x USB 3.1 Gen1, line-in, line-out, microphone, headphone, DisplayPort, DVI-D, RJ-45, Power: 210W or 280W Dimensions: 313 x 286 x 89 mm Weight: 5 kg

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q170 PCH-H Vpro Processors : Intel Core i5 6th Gen Memory Support : Four (4) DIMM slots , Up to 64 GB DDR4 - 2133 Hard Drive : SSD-PCIe,G2 SSD-PCIe, Sata 7.200rpm or SSD or SSHD Removable Media : HP 9.5mm Slim Desktop DVD-ROM ODD/DVDRW/BDXL Blu-Ray Drive Expansion Bays : External: One (1) 9mm Slim ODD Internal: Two (2) 3.5inch, One (1) 2.5inch Expansion Slots : Two (2) PCIe x1 v3.0, Two (2) PCIe x16 v3.0, Graphics : Intel HD Graphics Audio : HD audio with Realtek ALC221 codec Communications : Intel  I219LM Gigabit Ethernet Port I/O Ports : Front: Two (2) USB 2.0 (one includes fast charging), Two (2) USB 3.0, Audio I/O Rear: Six (6) USB 3.0, VGA, Two (2) DP, RJ-45, PS/2, Serial, Audio I/O Power : 200W Dimensions : 37.9 x 33.8 x 10 cm Weight : 7.6 kg

Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q170 Processors : Intel 6th generation Core i7, i5, i3, Pentium G Memory Support : Four (4) DIMM slots , Up to 64 GB DDR4 2133 MHz SDRAM  Hard Drive : SATA III HDD or SSD, M.2 SSD Removable Media : optional Expansion Bays : One (1) 5.25-inch for slim optical disc drive only, One (1) internal 3.5-inch, One (1) external 3.5-inch Expansion Slots : One (1) LP PCI-e 3.0 x16, One (1) LP PCI-e 2.0 x 4 (mech. x16), Two (2) LP PCI-e x 1 Graphics : Intel HD Graphics Audio : Realtek ALC671 Communications : 10/100/1,000 MBit/s Intel I219LM I/O Ports : Audio I/O, microphone, headphone, 2 x DisplayPort, DVI-D, RJ-45, front 2 x USB 2.0, 2 x USB 3.0, rear 2 x USB 2.0, 4 x USB 3.0, 2 x USB 2.0 Power : 280 watts Dimensions : 332 x 338 x 89 mm Weight : 8 kg

Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel Q270 Processors: Intel 6th & 7th Generation Core i3, i5, i7 Processors, Pentium G Memory Support: (2) SODIMM slots enabling up to 32GB DDR4-2400, dual channel memory support Speaker: Bang & Olufsen Audio Display: 24" diagonal IPS widescreen LED anti-glare backlit LCD (1920 x 1080). Hard Drive: SATA HDD or SSD, PCIe NMVe TLC SSD drives Removable Media: Slim DVD-ROM drive or Slim SuperMulti DVD writer drive Graphics: Integrated Intel HD Graphics Audio: Conexant CX5001 Codec Communications: Intel I219LM Gigabit Network Connection LOM I/O Ports: Integrated 2 MP webcam 1920 x 1080 pixels; (6) USB 3.1 Gen 1: (2) side; (4) rear; (1) USB Type-C 3.1 Gen1, (1) side; (1) DisplayPort with multi-stream; (1) HDMI; (1) RJ-45 Ethernet port Input Devices: Standard Keyboard, Mouse (USB) Power: 180 W active PFC Dimensions: 538.48 x 180.34 x 467.36 mm Weight: 8.73 kg

Operating System: Windows 10 Home & Pro MAR, Windows 11 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: N/A Processors: Intel 8th generation Core i3,i5,i7 Memory Support: Two (2) SODIMM slots , Up to 32 GB DDR4 2666MHz Display: 23.8" IPS Wide Viewing Angle WLED, Full HD 1920x 1080 resolution with anti-glare coating; optional projected capacitive touch screen Hard Drive : SATA HDD or SSD, M.2 SSD Removable Media : N/A Expansion Bays : Internal: One (1) 2.5-inch Expansion Slots : N/A Graphics : Intel HD Graphics, NVIDIA GeForce? GTX 1050, 4 GB (Optional) Audio : Integrated Audio Communications : Ethernet 1000Mbps I/O Ports : 5 x USB 3.1 Type A, USB Type C, DisplayPort, HDMI In, HDMI Out, RJ-45, Audio Line-Out Input Devices : Standard Keyboard, Mouse (USB) Power : 80 PLUS internal Power Supply Unit; optional 155W EPA Bronze or 200W EPA Platinum Dimensions : 34.40 cm (13.54") x Width: 54.02 cm (21.27") x Depth: 5.28 cm (2.08") Weight : 6.05 kg (13.34 lb)

Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel Q270 Processors: Intel Core i3/ i5 / i7 6th & 7th Gen Memory Support: Two (2)SODIMM slots ,32 GB dual channel DDR4 2133 MHz Speaker: Internal speaker amplifier, single 4-ohms speakers Display: 23.8" IPS Wide Viewing Angle WLED, Full HD 1920x 1080 resolution and Ultra HD (4K) 3840 x 2160 resolution with anti-glare coating. Hard Drive: one 2.5-inch SATA or SSD or one M.2 SSD Removable Media: DVD+/-RW and DVD/ROM Optical Disc Drives (optional), SD4.0 Media Card Reader (standard) Graphics: Integrated Intel HD 630/610/530/510 Audio: Intel High Definition Audio with Waves MaxxVoice Pro Communications: I219-LM Ethernet LAN 10/100/1000 I/O Ports: USB 3.1 Gen 1 x 2 (one with Type-C) USB 3.1 Gen 1 x 4 (rear)/ USB2.0 x 2 (rear), HDMI 1.4 Out (rear), HDMI 1.4 In(rear, DisplayPort 1.2 Out (rear), Audio I/O (side), Audio Line-Out (rear), RJ-45 (rear) Input Devices: Standard Keyboard, Mouse (USB) Power: 80 PLUS internal Power Supply Unit Dimensions: 39.3 x 57.5 x 6.4 cm Weight: 7.1 Kg

Operating System : Windows 10 Home & Pro MAR Chipset : Intel Q370 Processors : Intel 8th Gen Core i3, i5, i7, Intel Pentium G, Intel Celeron G Memory Support : Four (4) DIMM slots , Up to 64 GB DDR4 Hard Drive : SATA 7200 rpm or SSD, PCIe NMVe TLC SSD Removable Media : Optional Slim DVD-ROM/RW or Blu-Ray Expansion Bays : Internal: One (1) 2.5-inch, One (1) 3.5-inch, External: One (1) slim ODD, One (1) SD Card Reader Expansion Slots : One (1) Turbo Drive M.2 PCIe x1-2230, One (1) Turbo Drive M.2 PCIe x4-2280, One (1) PCI Express x16; One (1) PCI Express x4 Graphics : Intel HD Graphics Audio : Conexant CX20632 codec Communications : Intel I219-LM Gigabit Network Connection I/O Ports : Front: Two (2) USB 2.0, Two (2) USB 3.1, One (1) USB Type C 3.1Audio I/O,  Rear: Four (4) USB 3.1, Two (2) USB 2.0 Audio I/O, Two (2) DP, RJ-45 Input Devices : Standard Keyboard (USB), Standard Mouse (USB) Power : 180 W active PFC Dimensions : 93.98 x 269.24 x 297.18 mm Weight : 4.54 kg

Operating System: Windows 10 Home & Pro MAR, Windows 11 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: N/A Processors: Intel 8th generation Core i3,i5,i7 Memory Support: Two (2) SODIMM slots , Up to 32 GB DDR4 2666MHz Display: 23.8" IPS Wide Viewing Angle WLED, Full HD 1920x 1080 resolution with anti-glare coating; optional projected capacitive touch screen Hard Drive : SATA HDD or SSD, M.2 SSD Removable Media : N/A Expansion Bays : Internal: One (1) 2.5-inch Expansion Slots : N/A Graphics : Intel HD Graphics, NVIDIA GeForce? GTX 1050, 4 GB (Optional) Audio : Integrated Audio Communications : Ethernet 1000Mbps I/O Ports : 5 x USB 3.1 Type A, USB Type C, DisplayPort, HDMI In, HDMI Out, RJ-45, Audio Line-Out Input Devices : Standard Keyboard, Mouse (USB) Power : 80 PLUS internal Power Supply Unit; optional 155W EPA Bronze or 200W EPA Platinum Dimensions : 34.40 cm (13.54") x Width: 54.02 cm (21.27") x Depth: 5.28 cm (2.08") Weight : 6.05 kg (13.34 lb)