Software: In the 1980s, companies like Adobe Systems, Autodesk, and Electronic Arts emerged as the personal computer became a common tool in homes, schools, and offices.
Web Commerce: The standardization of the WWW protocol in 1991 led to the establishment of web browsers, expanding the market potential for companies like Amazon, eBay, PayPal, and Google.
Mobile Apps: The launch of the App Store in 2008 created a new market for mobile applications. Companies like Dropbox, Angry Birds, Shazam, and WhatsApp capitalized on the opportunity.
While these markets weren't always predictable at the time, early enthusiasts and technology experts recognized the potential for growth and launched successful companies.