Distributed Ledger System
In short: A distributed ledger system is a ledger whose data is stored on a network of decentralized nodes rather than in one central database.
A distributed ledger system is a ledger whose data is stored on a network of decentralized nodes rather than in one central database. Such a ledger does not necessarily contain a cryptocurrency: the shared record can track any kind of data.
Why it matters
In a traditional setup, each organization keeps its own records and spends time reconciling them with partners. In a distributed ledger system, every participating node holds a copy of the same record, updates are agreed through a consensus process, and each entry is signed so that its author can be identified. No single participant can quietly rewrite history, which makes the approach useful where parties need to share data but do not fully trust each other. Some systems are open to anyone, like public blockchains, while permissioned systems admit only approved members and often have no native coin at all.
Example
Several shipping companies, ports, and customs offices join a permissioned ledger to track containers. Each organization runs a node and signs the updates it adds, such as a container being loaded or cleared by customs. Everyone sees the same history, disputes about who changed what become easier to settle, and no cryptocurrency is involved at any point.