256gb ssd m.2 | Newegg.ca

Lenovo ThinkPad P51 15.6" Laptop Core i7 16GB 256GB SSD M.2 Dedicated Graphics Win 10 Pro 1 Yr Wty B v.WCB

Quick View

Refurbished Lenovo ThinkPad P51 15.6" Laptop Core i7 16GB 256GB SSD M.2 Dedicated Graphics Win 10 Pro 1 Yr Wty B v.WCB

Processor Name: 2.70GHz
Memory: 32GB
SSD: 256GB
GPU/VPU: NVIDIA Quadro M1200
Model #: 748768764719

$709^.09 –
$489.00 Shipping

Compare

Lenovo ThinkPad T460s 14" Laptop, Intel Core i5, 8GB RAM, 256GB SSD M.2, Windows 10 Pro!

Quick View

(1)

Refurbished Lenovo ThinkPad T460s 14" Laptop, Intel Core i5, 8GB RAM, 256GB SSD M.2, Windows 10 Pro!

Processor Name: 2.40GHz
Memory: 8GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: L10136

$478^.99 –
More options from $478.99 - $538.65
Free Shipping

Compare

Dell Latitude 5480 14" Laptop, Intel Quad Core i7 7820HQ 2.9Ghz, 16GB DDR4, 256GB M.2 SSD, Thunderbolt 3, 1080p Full HD, HDMI, Webcam, Windows 10

Quick View

(1)

Refurbished Dell Latitude 5480 14" Laptop, Intel Quad Core i7 7820HQ 2.9Ghz, 16GB DDR4, 256GB M.2 SSD, Thunderbolt 3, 1080p Full HD, HDMI, Webcam, Windows 10

Processor Name: Intel Core i7-7820HQ
Memory: 16GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 630
Model #: DPC-14311

$815^.67 –
$489.00 Shipping

Compare

HP EliteBook 840 G3 14" FHD 1920x1080 Laptop - Intel Core i5-6300U 2.4GHz 8GB Ram 256GB M.2 SSD WebCam Windows 10 Pro

Quick View

(1)

Refurbished HP EliteBook 840 G3 14" FHD 1920x1080 Laptop - Intel Core i5-6300U 2.4GHz 8GB Ram 256GB M.2 SSD WebCam Windows 10 Pro

Processor Name: Intel Core i5-6300U
Memory: 8GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: HP 840 G3 8GB 256GB

$479^.99 –
$489.00 Shipping

Compare

Lenovo ThinkPad 14.0" Intel Core i5-8350U 8GB Memory 256 GB M.2 NVMe SSD Windows 10 Pro 64-bit T480s

Quick View

Refurbished Lenovo ThinkPad 14.0" Intel Core i5-8350U 8GB Memory 256 GB M.2 NVMe SSD Windows 10 Pro 64-bit T480s

Processor Name: Intel Core i5-8350U
Memory: 8GB
SSD: 256 GB M.2 NVMe
GPU/VPU: Intel UHD Graphics 620
Model #: NE5-33239

$691^.27 –
More options from $315.22 - $691.27
$489.00 Shipping

Compare

HP ProBook 650 G2 Laptop, 15.6" LCD, Intel Core i7-6600U 2.3GHZ, 16GB DDR4 Memory, 256GB M.2 SSD, Windows 10 Pro, Grade B

Quick View

(5)

Refurbished HP ProBook 650 G2 Laptop, 15.6" LCD, Intel Core i7-6600U 2.3GHZ, 16GB DDR4 Memory, 256GB M.2 SSD, Windows 10 Pro, Grade B

Processor Name: 2.30GHz
Memory: 16GB
SSD: 256GB
GPU/VPU: Intel HD Graphics
Model #: HP650G2-GB

$430^.65 –
$489.00 Shipping

Compare

Dell Latitude 7480 14" Laptop, Intel Core i5 7300U 2.6Ghz, 16GB DDR4, 256GB M.2 SSD, Full HD 1080p, USB Type C, HDMI, Webcam, Windows 10 Pro (Grade B)

Quick View

Refurbished Dell Latitude 7480 14" Laptop, Intel Core i5 7300U 2.6Ghz, 16GB DDR4, 256GB M.2 SSD, Full HD 1080p, USB Type C, HDMI, Webcam, Windows 10 Pro (Grade B)

Processor Name: Intel Core i5-7300U
Memory: 16GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 620
Model #: DPC-14214

$719^.99 –
$489.00 Shipping

Compare

Lenovo ThinkPad T14 14" Laptop Core i7 32GB 256GB SSD M.2 Integrated Graphics Win 11 Pro 1 Yr Wty B v.WCA

Quick View

Refurbished Lenovo ThinkPad T14 14" Laptop Core i7 32GB 256GB SSD M.2 Integrated Graphics Win 11 Pro 1 Yr Wty B v.WCA

Processor Name: 1.80GHz
Memory: 32GB
SSD: 256GB
GPU/VPU: Intel UHD Graphics
Model #: LT14BWCi7QASCBHG1

$835^.65 –
$489.00 Shipping

Compare

Lenovo ThinkPad T480 i5-8250u 1.6 GHz 16gb 256gb m.2 ssd 14" FHD Screen 1920x1080 Backlit Keyboard Windows 10 Pro Grade B 256 GB 16GB

Quick View

Refurbished Lenovo ThinkPad T480 i5-8250u 1.6 GHz 16gb 256gb m.2 ssd 14" FHD Screen 1920x1080 Backlit Keyboard Windows 10 Pro Grade B 256 GB 16GB

Processor Name: Intel Core i5-8250U
Memory: 16GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 620
Model #: t48016256

$404^.99 –
$489.00 Shipping

Compare

Dell Latitude 7490 14" Laptop, Intel Core i7 8650U 1.9Ghz, 16GB DDR4, 256GB M.2 NVMe PCIe SSD, FHD 1080p, Thunderbolt 3, HDMI, Webcam, (Grade B) Windows 11 Pro

Quick View

Refurbished Dell Latitude 7490 14" Laptop, Intel Core i7 8650U 1.9Ghz, 16GB DDR4, 256GB M.2 NVMe PCIe SSD, FHD 1080p, Thunderbolt 3, HDMI, Webcam, (Grade B) Windows 11 Pro

Processor Name: Intel Core i7-8650U
Memory: 16GB
SSD: 256GB PCIe
GPU/VPU: Intel UHD Graphics 620
Model #: DPC-17763a

$646^.65 –
$489.00 Shipping

Compare

Dell Latitude 7290 Intel Core i5 8350U 1.7Ghz, 8GB DDR4, 256GB M.2 SSD, 12.5" HD Screen, Webcam, Windows 10 Pro

Quick View

(1)

Refurbished Dell Latitude 7290 Intel Core i5 8350U 1.7Ghz, 8GB DDR4, 256GB M.2 SSD, 12.5" HD Screen, Webcam, Windows 10 Pro

Processor Name: Intel Core i5-8350U
Memory: 8GB
SSD: 256GB PCIe
GPU/VPU: Intel UHD Graphics 620
Model #: 7290 8256

$746^.42 –
$489.00 Shipping

Compare

Dell Latitude 7490 14" Laptop, Intel Core i7 8650U 1.9Ghz, 8GB DDR4, 256GB M.2 NVMe PCIe SSD, FHD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 11 Pro

Quick View

Refurbished Dell Latitude 7490 14" Laptop, Intel Core i7 8650U 1.9Ghz, 8GB DDR4, 256GB M.2 NVMe PCIe SSD, FHD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 11 Pro

Processor Name: Intel Core i7-8650U
Memory: 8GB
SSD: 256GB PCIe
GPU/VPU: Intel UHD Graphics 620
Model #: DPC-16252a

$484^.65 –
$489.00 Shipping

Compare

Dell Latitude E7470 14" Laptop, Intel Core i5 6300U 2.4Ghz, 16GB DDR4, 256GB M.2 SSD, HDMI, Webcam, Windows 10

Quick View

Refurbished Dell Latitude E7470 14" Laptop, Intel Core i5 6300U 2.4Ghz, 16GB DDR4, 256GB M.2 SSD, HDMI, Webcam, Windows 10

Processor Name: Intel Core i5-6300U
Memory: 16GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DPC-08077

$600^.00 –
More options from $600.00 - $628.56
Free Shipping

Compare

Dell Latitude 7290 12.5" Laptop, Intel Core i7 8650U 1.9Ghz, 8GB DDR4, 256GB M.2 SSD, Thunderbolt USB C, HDMI, Webcam, Windows 10 Pro x64

Quick View

Refurbished Dell Latitude 7290 12.5" Laptop, Intel Core i7 8650U 1.9Ghz, 8GB DDR4, 256GB M.2 SSD, Thunderbolt USB C, HDMI, Webcam, Windows 10 Pro x64

Processor Name: Intel Core i7-8650U
Memory: 8GB
SSD: 256GB
GPU/VPU: Intel UHD Graphics 620
Model #: DPC-15622

$607^.49 –
$489.00 Shipping

Compare

Dell Latitude E5470 14" Laptop, Intel Core i5 6300U 2.4Ghz, 8GB DDR4, 256GB NVMe M.2 SSD, HDMI, Webcam, Windows 10 Pro x64

Quick View

Refurbished Dell Latitude E5470 14" Laptop, Intel Core i5 6300U 2.4Ghz, 8GB DDR4, 256GB NVMe M.2 SSD, HDMI, Webcam, Windows 10 Pro x64

Processor Name: Intel Core i5-6300U
Memory: 8GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DPC-11938

$548^.96 –
$489.00 Shipping

Compare

Dell Latitude 7480 14" Laptop, Intel Core i7 6600U 2.6Ghz, 8GB DDR4, 256GB M.2 SSD, Full HD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 (Grade B)

Quick View

Refurbished Dell Latitude 7480 14" Laptop, Intel Core i7 6600U 2.6Ghz, 8GB DDR4, 256GB M.2 SSD, Full HD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 (Grade B)

Processor Name: Intel Core i7-6600U
Memory: 8GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DPC-13975

$614^.32 –
$489.00 Shipping

Compare

Dell Latitude 7490 14" Laptop, Intel Core i5 8350U 1.7Ghz, 8GB DDR4, 256GB M.2 NVMe PCIe SSD, FHD 1080p, USB Type-C, HDMI, Webcam, Windows 10

Quick View

Refurbished Dell Latitude 7490 14" Laptop, Intel Core i5 8350U 1.7Ghz, 8GB DDR4, 256GB M.2 NVMe PCIe SSD, FHD 1080p, USB Type-C, HDMI, Webcam, Windows 10

Processor Name: Intel Core i5-8350U
Memory: 8GB
SSD: 256GB PCIe
GPU/VPU: Intel UHD Graphics 620
Model #: DPC-11815

$665^.62 –
$489.00 Shipping

Compare

Dell Latitude 7490 14" Laptop, Intel Core i7 8650U 1.9Ghz, 32GB DDR4, 256GB M.2 NVMe PCIe SSD, FHD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 Home

Quick View

Refurbished Dell Latitude 7490 14" Laptop, Intel Core i7 8650U 1.9Ghz, 32GB DDR4, 256GB M.2 NVMe PCIe SSD, FHD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 Home

Processor Name: Intel Core i7-8650U
Memory: 32GB
SSD: 256GB PCIe
GPU/VPU: Intel UHD Graphics 620
Model #: DPC-16238

$749^.25 –
$489.00 Shipping

Compare

Dell Latitude 7290 12.5" Laptop, Intel Core i7 8650U 1.9Ghz, 16GB DDR4, 256GB M.2 SSD, Thunderbolt USB C, HDMI, Webcam, Windows 10 Pro x64

Quick View

Refurbished Dell Latitude 7290 12.5" Laptop, Intel Core i7 8650U 1.9Ghz, 16GB DDR4, 256GB M.2 SSD, Thunderbolt USB C, HDMI, Webcam, Windows 10 Pro x64

Processor Name: Intel Core i7-8650U
Memory: 16GB
SSD: 256GB
GPU/VPU: Intel UHD Graphics 620
Model #: DPC-15594

$652^.79 –
$489.00 Shipping

Compare

Dell Latitude 7480 14" Laptop, Intel Core i7 6600U 2.6Ghz, 8GB DDR4, 256GB M.2 SSD, Full HD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10

Quick View

Refurbished Dell Latitude 7480 14" Laptop, Intel Core i7 6600U 2.6Ghz, 8GB DDR4, 256GB M.2 SSD, Full HD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10

Processor Name: Intel Core i7-6600U
Memory: 8GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DPC-12759

$682^.97 –
$489.00 Shipping

Compare

Dell Latitude 7480 14" Laptop, Intel Core i7 6600U 2.6Ghz, 32GB DDR4, 256GB M.2 SSD, Full HD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 Pro x64

Quick View

Refurbished Dell Latitude 7480 14" Laptop, Intel Core i7 6600U 2.6Ghz, 32GB DDR4, 256GB M.2 SSD, Full HD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 Pro x64

Processor Name: Intel Core i7-6600U
Memory: 32GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DPC-12754

$1,788^.32 –
$489.00 Shipping

Compare

Dell Latitude 7490 14 Laptop, Intel Core i7 8650U 1.9Ghz, 32GB DDR4, 256GB M.2 NVMe PCIe SSD, FHD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 Pro

Quick View

Refurbished Dell Latitude 7490 14 Laptop, Intel Core i7 8650U 1.9Ghz, 32GB DDR4, 256GB M.2 NVMe PCIe SSD, FHD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 Pro

Type: Home / Personal
Model #: 907052999965

$749^.25 –
$489.00 Shipping

Compare

Dell Latitude 5480 14" Laptop Core i5 8GB 256GB SSD M.2 Integrated Graphics Win 10 Home 1 Yr Wty A v.WAA

Quick View

Refurbished Dell Latitude 5480 14" Laptop Core i5 8GB 256GB SSD M.2 Integrated Graphics Win 10 Home 1 Yr Wty A v.WAA

Memory: 8GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 630
Brand: DELL
Model #: D5480AWAi5QAAHE1

$642^.60 –
$489.00 Shipping

Compare

Dell Latitude E7470 14" Laptop Core i5 8GB 256GB SSD M.2 Integrated Graphics Win 10 Home 1 Yr Wty B v.WBA

Quick View

Refurbished Dell Latitude E7470 14" Laptop Core i5 8GB 256GB SSD M.2 Integrated Graphics Win 10 Home 1 Yr Wty B v.WBA

Processor Name: 2.30GHz
Memory: 8GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DE7470BWBi5DABHE1

$605^.84 –
$489.00 Shipping

Compare

HP Elitebook 840 G3 FHD Laptop Computer PC, Intel i5 6300U 2.4GHz Processor, 8GB DDR4 Ram, 256 GB M.2 SSD, WiFi & Bluetooth, Webcam, Wireless Mouse & Sleeve, Windows 10 Professional (Renewed)

Quick View

Refurbished HP Elitebook 840 G3 FHD Laptop Computer PC, Intel i5 6300U 2.4GHz Processor, 8GB DDR4 Ram, 256 GB M.2 SSD, WiFi & Bluetooth, Webcam, Wireless Mouse & Sleeve, Windows 10 Professional (Renewed)

Memory: 8GB
SSD: 256GB
Operating System: Windows 10
Screen Size: 14.1"
Model #: B08Y6379NP

$519^.99 –
$489.00 Shipping

Compare

Dell Latitude E5470 14" Laptop Core i5 8GB 256GB SSD M.2 Integrated Graphics Win 10 Pro 1 Yr Wty B v.WCA

Quick View

(2)

Refurbished Dell Latitude E5470 14" Laptop Core i5 8GB 256GB SSD M.2 Integrated Graphics Win 10 Pro 1 Yr Wty B v.WCA

Processor Name: 2.60GHz
Memory: 8GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 530
Model #: DE5470BWCi5QABPF1

$532^.59 –
$489.00 Shipping

Compare

Dell Latitude E5470 14" Laptop Core i5 16GB 256GB SSD M.2 Integrated Graphics Win 10 Home 1 Yr Wty B v.CA

Quick View

Refurbished Dell Latitude E5470 14" Laptop Core i5 16GB 256GB SSD M.2 Integrated Graphics Win 10 Home 1 Yr Wty B v.CA

Processor Name: 2.30GHz
Memory: 16GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DE5470BCi5DAM.2W10HF

$559^.49 –
$489.00 Shipping

Compare

Dell Latitude E7270 12.5" Laptop Core i7 16GB 256GB SSD M.2 Integrated Graphics Win 10 Pro 1 Yr Wty B v.WCA

Quick View

Refurbished Dell Latitude E7270 12.5" Laptop Core i7 16GB 256GB SSD M.2 Integrated Graphics Win 10 Pro 1 Yr Wty B v.WCA

Processor Name: 2.30GHz
Memory: 16GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DE7270BWCi7DABPF1

$760^.83 –
$489.00 Shipping

Compare

Grade B LCD Dell Latitude 5480 14" Touchscreen Laptop, Intel Quad Core i7 7820HQ 2.9Ghz, 16GB DDR4, 256GB NVMe PCIe M.2 SSD, GeForce 930MX, Thunderbolt 3, 1080p Full HD, HDMI, Webcam, Windows 10 Pro

Quick View

Refurbished Grade B LCD Dell Latitude 5480 14" Touchscreen Laptop, Intel Quad Core i7 7820HQ 2.9Ghz, 16GB DDR4, 256GB NVMe PCIe M.2 SSD, GeForce 930MX, Thunderbolt 3, 1080p Full HD, HDMI, Webcam, Windows 10 Pro

Processor Name: Intel Core i7-7820HQ
Memory: 16GB
SSD: 256GB
GPU/VPU: NVIDIA GeForce 930MX
Model #: DPC-15413

$783^.07 –
$489.00 Shipping

Compare

Dell Latitude 7480 14" Laptop, Intel Core i7 6600U 2.6Ghz, 16GB DDR4, 256GB NVMe M.2 SSD, Full HD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 Pro x64

Quick View

Refurbished Dell Latitude 7480 14" Laptop, Intel Core i7 6600U 2.6Ghz, 16GB DDR4, 256GB NVMe M.2 SSD, Full HD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 Pro x64

Processor Name: Intel Core i7-6600U
Memory: 16GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DPC-13650

$639^.97 –
$489.00 Shipping

Compare

Grade B LCD Dell Latitude 7480 14" Laptop, Intel Core i7 6600U 2.6Ghz, 32GB DDR4, 256GB M.2 SSD, Full HD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 Pro x64

Quick View

Refurbished Grade B LCD Dell Latitude 7480 14" Laptop, Intel Core i7 6600U 2.6Ghz, 32GB DDR4, 256GB M.2 SSD, Full HD 1080p, Thunderbolt 3, HDMI, Webcam, Windows 10 Pro x64

Processor Name: Intel Core i7-6600U
Memory: 32GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DPC-14833

$699^.75 –
$489.00 Shipping

Compare

HP EliteBook 840 G4 14" Laptop, Intel i5 7300U 2.6GHz, 8GB DDR4 RAM, 256GB NVMe M.2 SSD, USB Type C, Webcam, Windows 10 (Grade B)

Quick View

Refurbished HP EliteBook 840 G4 14" Laptop, Intel i5 7300U 2.6GHz, 8GB DDR4 RAM, 256GB NVMe M.2 SSD, USB Type C, Webcam, Windows 10 (Grade B)

Processor Name: Intel Core i5-7300U
Memory: 8GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 620
Model #: DPC-13561

$608^.66 –
$489.00 Shipping

Compare

HP EliteBook 850 G6 15.6" Laptop, Intel i7 8665U 1.9GHz, 8GB DDR4 RAM, 256GB NVMe M.2 SSD, 1080p Full HD, USB C Thunderbolt 3, Webcam, Windows 11 Pro (Grade B)

Quick View

Refurbished HP EliteBook 850 G6 15.6" Laptop, Intel i7 8665U 1.9GHz, 8GB DDR4 RAM, 256GB NVMe M.2 SSD, 1080p Full HD, USB C Thunderbolt 3, Webcam, Windows 11 Pro (Grade B)

Processor Name: Intel Core i7-8665U
Memory: 8GB
SSD: 256GB PCIe
GPU/VPU: Intel UHD Graphics
Model #: DPC-20453

$741^.15 –
$489.00 Shipping

Compare

HP EliteBook 850 G6 15.6" Laptop, Intel i7 8665U 1.9GHz, 32GB DDR4 RAM, 256GB NVMe M.2 SSD, 1080p Full HD, USB C Thunderbolt 3, Webcam, Windows 11 Pro (Grade B)

Quick View

Refurbished HP EliteBook 850 G6 15.6" Laptop, Intel i7 8665U 1.9GHz, 32GB DDR4 RAM, 256GB NVMe M.2 SSD, 1080p Full HD, USB C Thunderbolt 3, Webcam, Windows 11 Pro (Grade B)

Processor Name: Intel Core i7-8665U
Memory: 32GB
SSD: 256GB PCIe
GPU/VPU: Intel UHD Graphics
Model #: DPC-20450

$822^.15 –
$489.00 Shipping

Compare

Lenovo Thinkpad T460s 14" Ultrabook, Intel i5 6300U 2.4Ghz, 12GB DDR4 RAM, 256GB M.2 SSD, 1080P Full HD, Webcam, HDMI, Windows 10 Pro - Grade B

Quick View

Refurbished Lenovo Thinkpad T460s 14" Ultrabook, Intel i5 6300U 2.4Ghz, 12GB DDR4 RAM, 256GB M.2 SSD, 1080P Full HD, Webcam, HDMI, Windows 10 Pro - Grade B

Processor Name: Intel Core i5-6300U
Memory: 12GB
SSD: 256GB
GPU/VPU: Intel HD Graphics 520
Model #: DPC-09962

$550^.13 –
$489.00 Shipping

Compare

HP EliteBook 840 G6 14" Laptop, Intel i7 8665U 1.9GHz, 32GB DDR4 RAM, 256GB NVMe M.2 SSD, 1080p Full HD, USB C Thunderbolt 3, Webcam, Windows 11 Pro

Quick View

Refurbished HP EliteBook 840 G6 14" Laptop, Intel i7 8665U 1.9GHz, 32GB DDR4 RAM, 256GB NVMe M.2 SSD, 1080p Full HD, USB C Thunderbolt 3, Webcam, Windows 11 Pro

Processor Name: Intel Core i7-8665U
Memory: 32GB
SSD: 256GB PCIe
GPU/VPU: Intel UHD Graphics
Model #: DPC-18484

$849^.15 –
$489.00 Shipping

Compare

Computer Systems