Premium 4-letter domain combining the word "development" with the letter "T", potentially signifying "test" or "tech".
Tdev has only four letters and only two syllables. Two-syllable names are exceptionally rare and highly prestigious. Successful brands using two syllable names include Subway, Disney and YouTube.
Tdev.com is a .com domain. Dot com domains are the most sought after top-level-domain in the world, famously used by websites like google.com. When most people think of a website, they think of a .com.