Interest
Proportion of Hacker News items mentioning "payphones" over time.
Mentions
Total number of Hacker News items mentioning "payphones" over time.
A payphone is typically a coin-operated public telephone, often located in a telephone booth or in high-traffic public areas. Prepayment is required by inserting coins or telephone tokens, swiping a credit or debit card, or using a telephone card. Read more on Wikipedia