Within each content area, there are one or more tutorials. Each tutorial consists of lessons. Each lesson should be a page detailing the concept being taught, along with sample code. Lesson and page ...

Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

P2P payment. Credit: Jack_the_sparow, Shutterstock. Spain is consolidating its position as a European leader in instant person-to-person (P2P) payments, driven by the widespread adoption of Bizum and ...

Payment institutions, digital wallets, and non‑bank payment platforms operating in Spain are also subject to the reporting obligations. Photo credit: Pixelated 275/Shutterstock The previous thresholds ...