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Property and Equipment, Net | 12 Months Ended
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Sep. 30, 2021
Property, Plant and Equipment [Abstract] |
Property and Equipment, Net | Note 8 — Property and Equipment, Net The components of property and equipment, net are:
|  | As of September 30, |
|  | 2021 |  |  | 2020 |
Computers, related equipment and software |  | $ | 1,195,787 |  |  | $ | 1,163,807 |
Building and land (1) |  |  | 291,262 |  |  |  | 177,255 |
Leasehold improvements |  |  | 244,858 |  |  |  | 234,777 |
Furniture, fixtures and other |  |  | 55,353 |  |  |  | 51,831 |
Property and equipment, gross |  |  | 1,787,260 |  |  |  | 1,627,670 |
Less accumulated depreciation |  |  | (1,088,492 | ) |  |  | (1,019,719 | )
Property and equipment, net |  | $ | 698,768 |  |  | $ | 607,951 |
(1) | For more details, please see also note 2.
Total depreciation expense for fiscal years 2021, 2020 and 2019, was $125,014, $117,632 and $111,387, respectively. As of September 30, 2021 and 2020, the costs, net of accumulated depreciation of software assets developed for internal use were $165,529 and $179,837, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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