Cracked wheat comes in various forms. Bulghur (or Burghul) is the most popularly used variant in Middle eastern cooking. Bulghar is essentially parboiled whole grain wheat, and the Indian variation is called Dalia.
Dalia is very similar to Bulghur, but I find it to be far softer in texture. Bulghur is used for all courses of the day, whereas in India, dalia is predominantly a breakfast staple.
This is not to be confused with Couscous. Unlike bulgur, couscous is not whole grain, and comes from a husked and crushed wheat called semolina. Couscous was originally made from millet, not wheat.
Coming back to Dalia, I love the versatility of this grain. You can replace it with Bulghur when not available, but do keep in mind that bulghur is more al dente.