Those are for crafting items at Memory Alpha. You'll need the schematics for the item you want to create other than hypos or batteries, they can be bought for 10,000 energy credits from a vendor, typically bought for a lot less (About 1,000 - 2,000) in the Exchange, or you can craft them yourself. You find them in some missions as well.
Anything crazy awesome though needs Unreplecatable Materials, which cost refined dilithium, and becomes expensive as all hell when you want to build, say, the Aegis set or outfit a high-Tier ship with weapons and equipment.
An alternative for finding ship items would be the STF missions (Although you need to be level 45 to begin those, and is a very grinding process (Rather much like the standard RPG concept of constant fighting to gain levels) to get the Encrypted Data Chips to purchase requisitions).
