# Steem Developer Portal - Glossary

### Chain Basics

Blockchain
  Decentralized ledger and consensus protocol
Steem
  Name of the blockchain and platform
Bandwidth
  formerly the limit of data each account can send/use (replaced by Resource Credits)
Resource Credits
  is the limit of data each account can utilize resources on the blockchain (also known as RC)
VESTS
  Vests is underlying token that STEEM is derived from, and are share in Steem Power
STEEM
  Currency of the blockchain, liquid version of Steem Power
SBD
  Steem Backed Dollar, $1 worth of STEEM
Steem Power
  Locked version of STEEM which gives account influence on the platform
Transaction
  Operations/Activity/Write requests to the blockchain
Block
  Bundle of transactions to be included in blockchain
Block Header
  Information about block, root and witness who signed, etc.
Price feed
  Feed that is maintained by witnesses to ensure SBD/STEEM price stability
Account
  User account on Steem blockchain
Authority
  Each Account has multiple authority and keys to manager different permissions on the platform
Owner
  Owner authority/permission of account
Public Key
  Public key of account's certain authority
Private Key
  Private key to sign a transaction with account's authority, should be kept secret because it grants access to account
Wif
  Wallet Import Format/Private key, should be kept secret because it grants access to account
Active key
  The active key is used to make transfers and place orders in the internal market
Posting key
  The posting key is used for posting and voting
Owner key
  The owner key is the master key for the account and is required to change the other keys
Vote
  Voting a content
Reputation
  Account's reputation on platform
Markdown language
  Easy to read and write, plain text format language commonly used to create Steemit articles
Permlink
  Unique identifier of every comment or post of an author, within the context of that author. ('@author/permlink' combos are globally unique)
Mainnet
  The 'production' Steem blockchain network wherein real STEEM is held and actual transactions take place.
Delegation
  The assignment of a portion your Steem Power for use to another account (cannot be spent, can be reclaimed)
PowerUp
  Convert STEEM to Steem Power and vice-versa with PowerDown

### Governance

DPOS
  Delegated Proof of Stake
Node
  Servers running blockchain software
Witness
  Witness is a position/role for the people who are chosen by community (delegate trust) to support platform and run consensus protocol to ensure security and validity of transactions/blocks on the blockchain
Hardfork
  Process to release protocol/blockchain consensus upgrades
Softfork
  Process to release protocol/blockchain software improvements
Witness Vote
  Voting/electing witnesses with account's stake

### Transactions

Transaction
  Operations submitted to the blockchain
Pending Transaction
  Transaction that is pending and to be included to the blockchain
Transaction Hex
  Hash of the transaction
Signatures
  Transaction signature signed by account with private key
Broadcast Transaction
  Event where signed transaction is broadcasted to the network, so that witnesses could validate and include in block
Virtual operation
  Operations that are derived from blockchain activity, but aren't actually stored as operations themselves (ex. curation and author rewards). They happen based on consensus from the blockchain based on other normal operations

### API

Trending
  Posts/Discussions that are highly valued by community with bigger time interval update
Hot
  Posts/Disccussions that are highly valued with shorter time interval update
Feed
  Posts/Disccussions from followers of particular account
Active
  Posts/Disscussions that are still actively being engaged
New
  Newly created posts
Cashout
  Posts which was paid out recently
Promoted
  Posts which was promoted by burning SBD to get more visibility
Pending Payout
  Estimated pending payout for blog posts/comments
Tags
  Tags, categories, hashtags each post is assigned to.
Trending Tags
  Mostly used tags
Following
  Account that is being followed
Follower
  Account that is following the user
State
  State of blockchain for path - accounts/tags/filters/posts
Dynamic Global Properties
  Current blockchain global properties which is being in each block
Median Price
  Median Price feed provided by all witnesses
Curator
  A steem user who upvotes a post by using their daily voting power to assign value to a post that they believe has good quality content and should be seen and the author rewarded
Curation reward
  The reward given to a curator, which is their portion of the 50% allocated to all curators that have upvoted a post
Resteem
  (Reblog) re-posting another authors' post in your blog feed for your followers list

### Market

Conversion Requests
  Request submitted for Converting SBD to STEEM
Order Book
  Internal market order book to exchange SBD<->STEEM
SMT
  Smart Media Tokens