The control chart is a graph used to study how a process changes over time. Data are plotted in time order. A control chart always has a central line for the average, an upper line for the upper control limit, and a lower line for the lower control limit. These lines are determined from historical data. By comparing current data to these lines, you can draw conclusions about whether the process variation is consistent (in control) or is unpredictable (out of control, affected by special causes of variation). This versatile data collection and analysis tool can be used by a variety of industries and is considered one of the seven basic quality tools.

ZipForge is a fast and powerful VCL Zip component, written in Delphi. It lets you easily create ZIP archives, extract files from zip files to hard drive or memory, add files to a zip archive from disk or memory, replace, move and delete files in zip archives. Also it creates and reads self-extracting (SFX) zip archives, AES encrypted and multi-volume zip files.

ZylGpsReceiver.NET is an event driven .NET framework / component collection that communicates with a GPS receiver. It returns latitude, longitude, altitude, speed, course, heading and many other useful parameters of the current position and the parameters of the satellites in view. The component is extended to calculate distances and make conversions between different measurement units and there is also an extension for google maps support, to be able to visualize the GPS positions in real time on a map engine.

ZylGSM is a Delphi & C++Builder component that communicates with a GSM modem or phone with integrated modem.

ZylIdleTimer.NET is a .NET class / component which lets you to take actions after a specified system-wide (related to the whole system) idle time or to check the time interval of user inactivity. It peeks at all user events for all applications, and cannot be limited to just your program. It may be used to automatically call a routine to log off the user and exit the application if there has been no activity for 30 minutes. It is intended to shut down your critical application if the user has gone to lunch or home, and left the application running. Any user activity, such as keyboard, mouse, or mouse-wheel in any application program will be considered user activity and will reset the inactivity clock.

ZylBurner.NET is a CD / DVD / Bluray burner .NET class / component. It is based on NeroCmd utility, so it needs Nero Burning ROM to be installed. This component is very easy to use, it's ideal for developers for quick CD / DVD / Bluray writing purposes from .NET applications.