Lines of code:

MS-DOS: 4 thousand
WhatsApp: 30 thousand
Telegram: 50 thousand
Zoom: 60 thousand
TikTok: 80 thousand
Space Shuttle: 400 thousand
Minecraft: 500 thousand
Instagram: 1 million
US Military Drone: 3.5 million
YouTube: 5.4 million
World of Warcraft: 5.5 million
Boeing 787: 6.5 million
Google Chrome: 6.7 million
Chevy Volt: 10 million
Twitter: 10 million