Final answer:
The two more popular OSPs are AOL (America Online) and CompuServe.
Step-by-step explanation:
The two more popular online service providers (OSPs) are AOL (America Online) and CompuServe.
AOL was one of the earliest online service providers, offering free access software and becoming widely known through their trial CDs in the 1990s.
They were able to acquire several companies, including Netscape and MapQuest, which contributed to their growth. CompuServe was another popular online service provider during the 1990s that offered access to the internet, and it was eventually overtaken by AOL.
Hence, two of the most well-known online service providers (OSPs) are AOL (America Online) and CompuServe.