Option gamma, often expressed using the Greek letter Γ, is a mathematical tool used in the option theory to explain the relationship between the value of an option and the price of the underlying asset. Option gamma is the option's sensitivity to change in the sensitivity of the option value to changes in the underlying asset price.

Macchanger is a Linux utility developed by Alvaro Lopez Ortega for viewing/manipulating the MAC addresses of network interfaces. Macchanger, or also by its official name MAC Changer, is an open source GNU/Linux utility. It is very easy to use and handy to anyone who needs to do analysis, testing, or other activities with network adapters.

Macshift is a free and open-source tool to change the MAC address of any network adapter under Windows 2k/XP/Vista. It has a simple scriptable commandline interface. Macshift is very easy to use.

Netstumbler is a very nice Windows-based tool for finding open wireless access points (this is also called "war driving"). NetStumbler is a Windows tool that allows you to discover 802.11a, 802.11b, and 802.11g wireless LANs. It includes GPS integration and a simple, intuitive user interface. Though primarily targeted at owners of wireless LANs, it has been the de facto tool for casual users such as "war drivers" since 2001.

The calculator below relates to the Black-Scholes model which is explained in detail on the Black-Scholes model page. You can use this calculator to find the value of a European call option using the Black-Scholes formula. This model is subject to assumptions discussed on the Black-Scholes model assumptions page.

The Black-Scholes Option Pricing Model is an approach used for calculating the value of a stock option. It can be used to calculate values of both call and put options. The Black-Scholes model is described in detail at this page: Black-Scholes model. This page provides an overview of assumptions underlying the Black-Scholes model.

The Black-Scholes model is a tool for pricing equity options. The Black-Scholes model, often also called using its full name Black-Scholes Option Pricing Model, is an approach for calculating the value of a stock option, let it be a call option or a put option.

Put-call parity is a financial relationship between the price of a put option and a call option. The put-call parity is a concept related to European call and put options. The put-call parity is an option pricing concept that requires the values of call and put options to be in equilibrium to prevent arbitrage.

The dontdisplaylastusername is a very handy setting if you want to improve the security of your computer. Setting the Do not display last user name setting removes any user account names from the Windows logon welcome screen and forces you to enter not only your password but also your user name when logging in.

The Control+Alt+Delete or Ctrl+Alt+Del key combination is often used on the Windows login or logon screen to strengthen security of a computer. The same like in older versions of Windows, the Ctrl+Alt+Del combination can also be enabled in Windows Vista.