77r24a6 | Newegg.com

Quick View

Refurbished Arista DCS-7500R2A-36CQ-LC 36P 100GbE QSFP28 Line Card

Brand: Arista
Type: Rack
Model #: 011110111494

$1,249^.00 –
Free Shipping

Compare

Quick View

HPE MSA 84TB SAS 12G Midline 7.2K LFF 3.5in M2 6-pack HDD Bundle (R0Q72A)

Model #: R0Q72A F/S

$2,843^.00 –
More options from $2,838.01 - $2,843.00
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Platinum 8168 2.7GHz 24-Core CPU, 64GB Memory, PERC H740p, 6x 16TB HDD, 2x Tray, 2x 10GbE SFP+, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Platinum 8168 2.7GHz 24-Core CPU, 64GB Memory, PERC H740p, 6x 16TB HDD, 2x Tray, 2x 10GbE SFP+, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 2.7GHz
Model #: 85a8100c-e291-443b-9a74-ecfe440a7a24

$4,662^.99 –
Free Shipping

Compare

Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Platinum 8160 2.1GHz 24 Core Processors, 768GB DDR4, H730P, 24x 800GB SSDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Quick View

Refurbished Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Platinum 8160 2.1GHz 24 Core Processors, 768GB DDR4, H730P, 24x 800GB SSDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Rack Height: 2U
Redundant Hot-swap Power: Yes
CPU Speed: 2.10 GHz
CPU Socket: LGA 3647
Model #: PE-R740XD-24B-SFF-V440

$13,061^.00 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Platinum 8168 2.7GHz 24-Core CPU, 64GB Memory, PERC H730p, 6x 4TB HDD, 2x 480GB SATA, 2x 10GbE SFP+, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Platinum 8168 2.7GHz 24-Core CPU, 64GB Memory, PERC H730p, 6x 4TB HDD, 2x 480GB SATA, 2x 10GbE SFP+, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 2.7GHz
Model #: 7877c2a2-cc57-484e-aa7b-7add173d3f1a

$2,574^.99 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Platinum 8168 2.7GHz 24-Core CPU, 64GB Memory, PERC H740p, 6x 8TB HDD, 2x 480GB SATA, 2x 10GbE SFP+, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Platinum 8168 2.7GHz 24-Core CPU, 64GB Memory, PERC H740p, 6x 8TB HDD, 2x 480GB SATA, 2x 10GbE SFP+, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 2.7GHz
Model #: 72a9b92a-72f8-4acb-9b0e-d7b7859063cd

$3,093^.99 –
Free Shipping

Compare

Dell EMC R740XD 24 Bay Server 20 Cores Silver 4210 256GB RAM H740P + X540/i350 24x 1TB New SSD

Quick View

Refurbished Dell EMC R740XD 24 Bay Server 20 Cores Silver 4210 256GB RAM H740P + X540/i350 24x 1TB New SSD

Brand: DELL
Type: Rackmount
LEDs: Power, Ethernet, USB
CPU Type: Silver 4210
Model #: DSB 470206

$5,638^.39 –
Free Shipping

Compare

Dell EMC R740XD 24 Bay Server 32 Cores Gold 5218 256GB RAM H740P + X520/i350 24x 1TB New SSD

Quick View

Refurbished Dell EMC R740XD 24 Bay Server 32 Cores Gold 5218 256GB RAM H740P + X520/i350 24x 1TB New SSD

Brand: DELL
Type: Rackmount
LEDs: Power, Ethernet, USB
CPU Type: Gold 5218
Model #: DSB 470148

$5,642^.39 –
Free Shipping

Compare

Dell EMC R740xd 24 Bay SFF 2U Server, 2x Platinum 8173M 2.0GHz 28C CPU, 768GB (24 x 32GB) DDR4 RDIMM 2666MHz, H740p, 4x Tray X520/i350 NDC

Quick View

Refurbished Dell EMC R740xd 24 Bay SFF 2U Server, 2x Platinum 8173M 2.0GHz 28C CPU, 768GB (24 x 32GB) DDR4 RDIMM 2666MHz, H740p, 4x Tray X520/i350 NDC

Model #: b7318640-0180-4c2e-a780-a44015cf07ee

$3,379^.99 –
Free Shipping

Compare

Dell EMC R740XD 24 Bay Server 36 Cores Gold 6240 256GB RAM H740P + X520/i350 24x 1TB New SSD

Quick View

Refurbished Dell EMC R740XD 24 Bay Server 36 Cores Gold 6240 256GB RAM H740P + X520/i350 24x 1TB New SSD

Brand: DELL
Type: Rackmount
LEDs: Power, Ethernet, USB
CPU Type: Gold 6240
Model #: DSB 470149

$5,672^.39 –
Free Shipping

Compare

Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Gold 6130 2.1GHz 16 Core Processors, 768GB DDR4, H730P, 24x 800GB SSDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Quick View

Refurbished Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Gold 6130 2.1GHz 16 Core Processors, 768GB DDR4, H730P, 24x 800GB SSDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Rack Height: 2U
Redundant Hot-swap Power: Yes
CPU Speed: 2.10 GHz
CPU Socket: LGA 3647
Model #: PE-R740XD-24B-SFF-V340

$12,937^.00 –
Free Shipping

Compare

Dell PowerEdge R740XD 48 Core Server 2X Platinum 8160 H730P 256GB RAM X540/ I350 6mo War

Quick View

Refurbished Dell PowerEdge R740XD 48 Core Server 2X Platinum 8160 H730P 256GB RAM X540/ I350 6mo War

Brand: DELL
Type: Rackmount
LEDs: Power, Ethernet, USB
CPU Type: Platinum 8160
Model #: DSB 155554

$2,358^.76 –
Free Shipping

Compare

Dell EMC R740xd 24 Bay SFF 2U Server, 2x Platinum 8173M 2.0GHz 28C CPU, 128GB (2 x 64GB) DDR4 RDIMM 2666MHz, HBA330, 24x 900GB 10K 12G SAS Drive X520/i350 NDC

Quick View

Refurbished Dell EMC R740xd 24 Bay SFF 2U Server, 2x Platinum 8173M 2.0GHz 28C CPU, 128GB (2 x 64GB) DDR4 RDIMM 2666MHz, HBA330, 24x 900GB 10K 12G SAS Drive X520/i350 NDC

Model #: 208d6273-e5c1-4463-84cd-d275d13ebbde

$2,803^.99 –
Free Shipping

Compare

Dell EMC R740XD 24 Bay Server 16 Cores Gold 6234 512GB RAM H740P + X520/i350 24x 1TB NEW SSD

Quick View

Refurbished Dell EMC R740XD 24 Bay Server 16 Cores Gold 6234 512GB RAM H740P + X520/i350 24x 1TB NEW SSD

Brand: DELL
Type: Rackmount
LEDs: Power, Ethernet, USB
CPU Type: Gold 6234
Model #: DSB 470151

$7,286^.31 –
Free Shipping

Compare

Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Gold 5118 2.3GHz 12 Core Processors, 128GB DDR4, H730P, 24x 600GB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Quick View

Refurbished Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Gold 5118 2.3GHz 12 Core Processors, 128GB DDR4, H730P, 24x 600GB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Rack Height: 2U
Redundant Hot-swap Power: Yes
CPU Speed: 2.30 GHz
CPU Socket: LGA 3647
Model #: PE-R740XD-24B-SFF-V70

$2,657^.00 –
More options from $2,325.36 - $2,657.00
Free Shipping

Compare

Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Gold 6134 3.2GHz 8 Core Processors, 128GB DDR4, H730P, 24x 800GB SSDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Quick View

Refurbished Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Gold 6134 3.2GHz 8 Core Processors, 128GB DDR4, H730P, 24x 800GB SSDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Rack Height: 2U
Redundant Hot-swap Power: Yes
CPU Speed: 3.20 GHz
CPU Socket: LGA 3647
Model #: PE-R740XD-24B-SFF-V350

$6,883^.00 –
Free Shipping

Compare

Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Platinum 8160 2.1GHz 24 Core Processors, 512GB DDR4, H730P, 2x 300GB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Quick View

Refurbished Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Platinum 8160 2.1GHz 24 Core Processors, 512GB DDR4, H730P, 2x 300GB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Rack Height: 2U
Redundant Hot-swap Power: Yes
CPU Speed: 2.10 GHz
CPU Socket: LGA 3647
Model #: PE-R740XD-24B-SFF-V230

$5,823^.00 –
Free Shipping

Compare

Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Silver 4110 2.1GHz 8 Core Processors, 512GB DDR4, H730P, 24x 2.4TB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Quick View

Refurbished Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Silver 4110 2.1GHz 8 Core Processors, 512GB DDR4, H730P, 24x 2.4TB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Rack Height: 2U
Redundant Hot-swap Power: Yes
CPU Speed: 2.10 GHz
CPU Socket: LGA 3647
Model #: PE-R740XD-24B-SFF-V24

$13,187^.00 –
Free Shipping

Compare

Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Gold 6148 2.4Ghz 20 Core Processors, 768GB DDR4, H730P, 2x 300GB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Quick View

Refurbished Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Gold 6148 2.4Ghz 20 Core Processors, 768GB DDR4, H730P, 2x 300GB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Rack Height: 2U
Redundant Hot-swap Power: Yes
CPU Speed: 2.40 GHz
CPU Socket: LGA 3647
Model #: PE-R740XD-24B-SFF-V206

$8,265^.00 –
More options from $6,709.42 - $8,265.00
Free Shipping

Compare

Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Gold 6130 2.1GHz 16 Core Processors, 128GB DDR4, H730P, 24x 600GB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Quick View

Refurbished Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Gold 6130 2.1GHz 16 Core Processors, 128GB DDR4, H730P, 24x 600GB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Rack Height: 2U
Redundant Hot-swap Power: Yes
CPU Speed: 2.10 GHz
CPU Socket: LGA 3647
Model #: PE-R740XD-24B-SFF-V100

$2,777^.00 –
Free Shipping

Compare

Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Silver 4116 2.1GHz 12 Core Processors, 64GB DDR4, H730P, 24x 1.2TB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Quick View

Refurbished Dell PowerEdge R740xd - 24 Bay 2.5" 2U Server - 2x Intel Xeon Silver 4116 2.1GHz 12 Core Processors, 64GB DDR4, H730P, 24x 1.2TB HDDs, X520/I350, iDRAC9 Enterprise, 2x 1100 Watt PSUs, Bezel, Rails

Rack Height: 2U
Redundant Hot-swap Power: Yes
CPU Speed: 2.10 GHz
CPU Socket: LGA 3647
Model #: PE-R740XD-24B-SFF-V35

$2,463^.00 –
Free Shipping

Compare

Dell EMC R740XD 24 Bay Server 16 Cores Gold 6234 256GB RAM H740P + X540/i350 24x 1TB SSD

Quick View

Refurbished Dell EMC R740XD 24 Bay Server 16 Cores Gold 6234 256GB RAM H740P + X540/i350 24x 1TB SSD

Brand: DELL
Type: Rackmount
LEDs: Power, Ethernet, USB
CPU Type: Gold 6234
Model #: DSB 470207

$5,788^.39 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Silver 4215R 3.2GHz 8-Core CPU, 192GB Memory, PERC H740p, 6x 4TB HDD, 2x 600GB HDD, 2x 10GbE SFP+, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Silver 4215R 3.2GHz 8-Core CPU, 192GB Memory, PERC H740p, 6x 4TB HDD, 2x 600GB HDD, 2x 10GbE SFP+, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 3.2GHz
Model #: a7fea268-97a0-40cf-b47a-45d893f9a6f1

$4,993^.99 –
Free Shipping

Compare

Quick View

Refurbished Arista DCS-7500R2-36CQ-LC 36P 100GbE QSFP28 Line Card

Brand: Arista
Type: Rack
Model #: 011110111487

$499^.00 –
Free Shipping

Compare

Quick View

Refurbished Arista DCS-7500R-36CQ-LC 36P 100GbE QSFP28 Line Card

Model #: 011110109798

$349^.00 –
Free Shipping

Compare

Quick View

Refurbished Arista DCS-7500R-48S2CQ-LC 48P SFP+ 2P QSFP28 Line Card

Brand: Arista
Type: Rack
Model #: 011110111364

$549^.00 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 5218R 2.1GHz 20-Core CPU, 256GB Memory, PERC H730p, 6x 14TB HDD, 4x 480GB SATA, 2x 10GbE SFP+, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 5218R 2.1GHz 20-Core CPU, 256GB Memory, PERC H730p, 6x 14TB HDD, 4x 480GB SATA, 2x 10GbE SFP+, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 2.1GHz
Model #: 794c05a1-5b07-473e-97df-a3ba25458fa2

$5,638^.99 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Platinum 8270 2.7GHz 26-Core CPU, 64GB Memory, PERC H740p, 12x 14TB HDD, 2x Tray, 2x 10GbE, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Platinum 8270 2.7GHz 26-Core CPU, 64GB Memory, PERC H740p, 12x 14TB HDD, 2x Tray, 2x 10GbE, Rails

Model #: 280f00a7-3f76-49df-a572-dc2183b65f1c

$6,237^.99 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6242R 3.1GHz 20-Core CPU, 192GB Memory, PERC H730p, 12x 16TB HDD, 2x 480GB SATA, 2x 25GbE SFP28, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6242R 3.1GHz 20-Core CPU, 192GB Memory, PERC H730p, 12x 16TB HDD, 2x 480GB SATA, 2x 25GbE SFP28, Rails

Model #: 1837083a-176a-4ee7-b6c7-46d959c77263

$9,383^.99 –
Free Shipping

Compare

Dell EMC R740xd 24 Bay SFF 2U Server, 2x Platinum 8173M 2.0GHz 28C CPU, 384GB (12 x 32GB) DDR4 RDIMM 2666MHz, H740p, 24x 800GB SSD 2x 25GbE SFP+ 8x5xNBD 3YR Warranty

Quick View

Refurbished Dell EMC R740xd 24 Bay SFF 2U Server, 2x Platinum 8173M 2.0GHz 28C CPU, 384GB (12 x 32GB) DDR4 RDIMM 2666MHz, H740p, 24x 800GB SSD 2x 25GbE SFP+ 8x5xNBD 3YR Warranty

Model #: 7851630f-4e3d-4135-81fb-eb03aab043bb

$4,780^.99 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6146 3.2GHz 12-Core CPU, 256GB Memory, PERC H730p, 6x Trays, 2x Tray, 2x 10GbE SFP+, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6146 3.2GHz 12-Core CPU, 256GB Memory, PERC H730p, 6x Trays, 2x Tray, 2x 10GbE SFP+, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 3.2GHz
Model #: af74627a-b75b-4944-8aac-6a063c7db90b

$3,798^.99 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Silver 4215R 3.2GHz 8-Core CPU, 192GB Memory, PERC H730p, 6x 16TB HDD, 2x Tray, 2x 25GbE SFP28, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Silver 4215R 3.2GHz 8-Core CPU, 192GB Memory, PERC H730p, 6x 16TB HDD, 2x Tray, 2x 25GbE SFP28, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 3.2GHz
Model #: 72a06a19-8072-4d97-a1b7-6be199df6463

$6,874^.99 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6242R 3.1GHz 20-Core CPU, 128GB Memory, PERC H730p, 6x 10TB HDD, 4x 480GB SATA, 2x 25GbE SFP28, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6242R 3.1GHz 20-Core CPU, 128GB Memory, PERC H730p, 6x 10TB HDD, 4x 480GB SATA, 2x 25GbE SFP28, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 3.1GHz
Model #: 7c620995-1f24-4965-b2e7-ae720a293ad2

$5,251^.99 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6242R 3.1GHz 20-Core CPU, 128GB Memory, PERC H740p, 6x 16TB HDD, 4x 480GB SATA, 2x 10GbE SFP+, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6242R 3.1GHz 20-Core CPU, 128GB Memory, PERC H740p, 6x 16TB HDD, 4x 480GB SATA, 2x 10GbE SFP+, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 3.1GHz
Model #: 70ad5776-759a-4b13-b1a0-8d04c8320e36

$6,461^.99 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6242R 3.1GHz 20-Core CPU, 192GB Memory, PERC H730p, 6x 16TB HDD, 2x 600GB HDD, 2x 10GbE, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6242R 3.1GHz 20-Core CPU, 192GB Memory, PERC H730p, 6x 16TB HDD, 2x 600GB HDD, 2x 10GbE, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 3.1GHz
Model #: 77737076-36e0-4401-ac27-6421d86c1a24

$6,759^.99 –
Free Shipping

Compare

Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6242R 3.1GHz 20-Core CPU, 128GB Memory, PERC H730p, 6x 10TB HDD, 4x 600GB HDD, 2x 25GbE SFP28, Rails

Quick View

Refurbished Dell EMC PowerEdge R740xd 12LFF with 4SFF Flex Bay, 2x Xeon Gold 6242R 3.1GHz 20-Core CPU, 128GB Memory, PERC H730p, 6x 10TB HDD, 4x 600GB HDD, 2x 25GbE SFP28, Rails

Brand: DELL
Type: Rack
CPU Type: Xeon
CPU Speed: 3.1GHz
Model #: 77aa733c-d2b3-420f-8117-eacfab47708a

$5,167^.99 –
Free Shipping

Compare

Server & Workstation System