PDID or Personal Digital Identity Device is a term that is becoming increasingly important in the modern world. With the increase in digital transactions and online activity, a reliable and secure PDID is essential. However, there are other terms that are used interchangeably with PDID, such as digital wallet, e-wallet, electronic ID, virtual identity, and digital identity. Regardless of the terminology, the core function remains the same - a way to securely hold, manage, and share personal identity information. As technology continues to advance, the PDID concept will evolve, and the terminology may change, but the need for a reliable, secure digital identity will remain a crucial component of modern life.