It's a general, tech themed, simple pack that is designed to feel like normal minecraft but with extended features and a nearly unlimited endgame progression.
This adds mods like create (one of the most popular and well-made mechanical automation mods), mekanism (one of the best high-tech progression mods for modern versions), refined storage (to deal with the endless supply of items you will eventually need to reach the true end game) , and Tinker's Construct, one of my favorite early to end game tool mods that often feels so polished it could be a vanilla feature.