Digital assets and currencies
Understand assets, networks and trading mechanics with sources you can check.
The Oyster card is a payment method for public transport in London and some surrounding areas. A standard Oyster card is a blue credit-card-sized stored-value contactless smart card. It is operated by Transport for London (TfL) and can be used as part of London's integrated transport network on travel modes including London Buses, London Underground, the Docklands Light Railway (DLR), Lo