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[Home ](./index.md ) > [bitburner ](./bitburner.md ) > [Corporation ](./bitburner.corporation.md )
## Corporation interface
Corporation API
< b > Signature:< / b >
```typescript
export interface Corporation extends WarehouseAPI, OfficeAPI
```
< b > Extends:</ b > [WarehouseAPI ](./bitburner.warehouseapi.md )<!-- --> , [OfficeAPI ](./bitburner.officeapi.md )
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## Properties
| Property | Type | Description |
| --- | --- | --- |
| [enums ](./bitburner.corporation.enums.md ) | { EmployeePositions: typeof [EmployeePositions ](./bitburner.employeepositions.md )<!-- --> ; IndustryType: typeof [IndustryType ](./bitburner.industrytype.md )<!-- --> ; } | Enums specific to the corporation game mechanic. |
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## Methods
| Method | Description |
| --- | --- |
| [acceptInvestmentOffer() ](./bitburner.corporation.acceptinvestmentoffer.md ) | Accept investment based on you companies current valuation |
| [bribe(factionName, amountCash) ](./bitburner.corporation.bribe.md ) | Bribe a faction |
| [buyBackShares(amount) ](./bitburner.corporation.buybackshares.md ) | Buyback Shares |
| [createCorporation(corporationName, selfFund) ](./bitburner.corporation.createcorporation.md ) | Create a Corporation |
| [expandCity(divisionName, cityName) ](./bitburner.corporation.expandcity.md ) | Expand to a new city |
| [expandIndustry(industryType, divisionName) ](./bitburner.corporation.expandindustry.md ) | Expand to a new industry |
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| [getBonusTime() ](./bitburner.corporation.getbonustime.md ) | Get bonus time. “Bonus time” is accumulated when the game is offline or if the game is inactive in the browser. “Bonus time” makes the game progress faster. |
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| [getCorporation() ](./bitburner.corporation.getcorporation.md ) | Get corporation data |
| [getDivision(divisionName) ](./bitburner.corporation.getdivision.md ) | Get division data |
| [getExpandCityCost() ](./bitburner.corporation.getexpandcitycost.md ) | Gets the cost to expand into a new city |
| [getExpandIndustryCost(industryName) ](./bitburner.corporation.getexpandindustrycost.md ) | Gets the cost to expand into a new industry |
| [getInvestmentOffer() ](./bitburner.corporation.getinvestmentoffer.md ) | Get an offer for investment based on you companies current valuation |
| [getMaterialNames() ](./bitburner.corporation.getmaterialnames.md ) | Get list of materials |
| [getResearchNames() ](./bitburner.corporation.getresearchnames.md ) | Get list of research names |
| [getUnlockables() ](./bitburner.corporation.getunlockables.md ) | Get list of one-time unlockable upgrades |
| [getUnlockUpgradeCost(upgradeName) ](./bitburner.corporation.getunlockupgradecost.md ) | Gets the cost to unlock a one time unlockable upgrade |
| [getUpgradeLevel(upgradeName) ](./bitburner.corporation.getupgradelevel.md ) | Get the level of a levelable upgrade |
| [getUpgradeLevelCost(upgradeName) ](./bitburner.corporation.getupgradelevelcost.md ) | Gets the cost to unlock the next level of a levelable upgrade |
| [getUpgradeNames() ](./bitburner.corporation.getupgradenames.md ) | Get list of upgrade names |
| [goPublic(numShares) ](./bitburner.corporation.gopublic.md ) | Go public |
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| [hasCorporation() ](./bitburner.corporation.hascorporation.md ) | Returns whether the player has a corporation. Does not require API access. |
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| [hasUnlockUpgrade(upgradeName) ](./bitburner.corporation.hasunlockupgrade.md ) | Check if you have a one time unlockable upgrade |
| [issueDividends(rate) ](./bitburner.corporation.issuedividends.md ) | Issue dividends |
| [levelUpgrade(upgradeName) ](./bitburner.corporation.levelupgrade.md ) | Level an upgrade. |
| [sellShares(amount) ](./bitburner.corporation.sellshares.md ) | Sell Shares |
| [unlockUpgrade(upgradeName) ](./bitburner.corporation.unlockupgrade.md ) | Unlock an upgrade |