Havan
Fire sacrifice with a particular Mantra for a particular purpose. A word ‘Swaahaa’ is pronounced at the end of every Mantra. Havan generates huge quantity of energy for the person for whom it is done. In Havan, the Pandit or host puts some specific materials in fire from a few times to many thousands of times after speaking a particular Mantra for a particular purpose. It gives an energy to the attending person as well as believably also to God to maintain his entire creation. Scientifically, the Havan materials purify the atmosphere as well as these help in bringing rain.

Aaratee
A ritual done by Deepak (lamp) moving around God, taking his obstructions away (in fact, we pray God also as friend, father, child and Guru). In all these emotions, we take care of his problems too. Normally we sing his prayer while doing Aaratee. "Om Jaya Jagadeesh Hare...." is the most popular Aaratee.

Jap
It is recite of a Mantra. These Mantra can be either Vaidik or from Puraan and have their particular results. One Mantra has sometimes more applications. For example, Mahaa Mrityunjaya Mantra has 7 applications – Rana-jaya (victory), Dhananjaya (wealth), Shatrunjaya (Enemy), Mritunjaya (Danger), Vyaadhinjaya (illness), Aadhinjaya (Psychics), Kaalanjaya (Short longevity).

Stotra Paath
Paath is the reading prayers of God / goddesses for particular purposes. These Paath contain several or several thousands of Vaidik Verses and can take 1 to 1000 minutes depending upon the application of rituals. Normally Pandit read it from books but some people know it by tong. A Stotra is normally the prayer of a particular god for a particular purpose. For example Shiv has hundreds of prayers, some for being prosperous, some for getting married and some for saving life.

Om
The symbol of God. Contains the power of all Gods and Goddesses. Praying Om is more than sufficient to eliminate problems and sins. This sound must be chanted before every Mantra for complete effect.

Yagya
Normally its done exclusively for Havan and kept clean and pure. A deep ditch surrounded by a lower wall, called Havan Kund

Kalash
The water pot and symbol of welfare is worshipped as Kalash; and Kalash Poojaa is compulsory in every ritual. Big rituals have more than one Kalash.

Tulasee
Also called as Vrindaa. Wife of Lord Vishnu and giver of prosperity. Every Hindu family has a Tulasee plant in its courtyard. Symbol of Vrindaa and used in every ritual.

Yantra
A magnetic diagram which attracts magnetic energy Yantra are put in the rituals for better results. They are to be worshipped during Poojaa, and later either ae discarded in some special way or are worn for better results of Yagya. See more details about Yantra at www.jantarmantar.com

Yagya-Shaalaa
The place where the Yagya is performed.

Shankh
Blowing Shankh in a Yagya is very traditional and meaningful. First it gives the listeners energy to feel strong and better, in the other hand it makes more energy than normal frequency (20-20000 hz) of sound energy which reaches instant effect to the person who hears it.