Business and finance
Payment systems, financial terms and business concepts in plain words.
Articles in “Business and finance”

S&P 500: what it is and why invest in it
What the S&P 500 index is, which advantages it gives investors and which risks it carries.

The Mir payment system: what it is and its advantages
What the Mir payment system is, how it came about and what it offers cardholders.

American Express: history, advantages and disadvantages
How American Express came about, how its system differs from Visa and Mastercard, and what Amex cards offer.