||Set of Pravda nodes connected via internet.
||A software that manage Pravda blockchain and executes programs.
||A stable network.
||Clone of mainnet which resets every week.
||The program represented in Pravda bytecode, which has an unique address and can be called by it.
||The stored program which is not modifiable. The owner of a program can modify it if the program is not sealed (i.e. immutable). The owner of a program can make it sealed, but he can't make a sealed program modifiable again.