Purchasing power parity (PPP) is an economic theory that states that the exchange rate between two currencies is equal to the ratio of the currencies' respective purchasing power.
MAC Address Generation. Each virtual network adapter in a virtual machine is assigned its own unique MAC address. Each network adapter manufacturer is assigned a unique three-byte prefix called an Organizationally Unique Identifier (OUI), which it can use to generate unique MAC addresses.
Unique Learner Number (ULN) is a 10-digit reference number issued and held by the Learner Register (LR) . This is used alongside and to access the Personal Learning Record of anyone over the age of 14 involved in UK education or training.ts purpose is purely to provide a unique identifier for each individual's Personal Learning Record. Learners will retain the same number for accessing their Personal Learning Record throughout their lives, whatever their level of learning and wherever they choose to participate in education, training and learning.