Online casinos allow players to gamble throughout the Internet as well as in the comfort of whatever place they're in rather than traveling to wherever their favorite establishments are located. They may be also known as Internet casinos or virtual casinos due to this. The same as their tangible "brick and mortar" counterparts, online casinos have ratings in the form of payback percentages and odds. Some of them even publish payout percentages on their sites, vaunting higher payback and higher frequency than their competitors. Payback percentage is defined as "is the overall percentage that a machine will return to the player within the long haul." This parameter is normally programmed into whatever game the virtual casino might be running and is set according to the owner's specifications. Because of its very nature of being virtual and intangible, online casinos have trust issues with prospective and also regular clients. In light of this many casino owners have purchased and/or leased proprietary software made by reputable software entities like CryptoLogic Inc, Realtime Gaming, Microgaming, and Playtech. They then peg their online casino's trustworthiness with the programming companies' reputations as well as the stability of their random number generators. Online casinos are classified into three types based on how players communicate with each other. They are: Web-based online casinos - these types of virtual casinos do not require downloading files; they readily play by way of a wide range of Internet browsers. Some of them require Flash or Java for a player to participate in games however. The benefit of this kind of casino is that sound clips and graphics needed for the game is streamed directly to the client over the Net. This dispenses the need to download relatively huge files. Download-based online casinos - Engaged in this sort of casino involves downloading a client installer needed for players to access the virtual site. The benefit from this type of casino is that it generally runs considerably faster than Web-based ones. The disadvantage is that interested players need to download the client as well as the risk of installing malware from shady parties can be very much real. Live-based casinos - In this kind of casino, players can hear, see, and communicate with other players. The net is simply relatively an unobtrusive medium of communication as players participate in a real life environment. Online casinos may offer anyone or all the following gambling pastimes: online lottery poker, roulette, blackjack, baccarat, craps and online slot games.