Abstract: According to one aspect, a digital display unit includes a microcontroller to process digital information received from one or more sensors, a display, and a switch in electrical communication with the microcontroller so that the microcontroller displays an output on the display that is specific to a type of sensor. The type of sensor may be selected from a position sensor, a pressure sensor, and a stroke counter. The digital display unit may be part of a choke control panel. The microcontroller and the display may be disposed in an enclosure, and an electrical power source may be disposed in the enclosure to supply electrical power to the microcontroller and the one or more sensors. A digital hydraulic choke position sensor assembly and a digital pressure sensor assembly are also described, one or both of which may be used in a system for drilling an oil or gas well.

Abstract: A Web site, through the use of a Rules Engine, determines an expertise level of a User for one or more topics on a Web page. The Rules Engine may analyze User related data, such as the search term used by the User to find the Web site, the past products purchased by the User, the path through the Web site taken by the User, the usage history by the User on the Web site, the demographics of the User and/or the self declared expertise level of the User, to determine an expertise level of the User for the topics on the Web page. A Display Engine may customize a Web page based on the expertise levels of a User so that topics on the Web page are presented in a manner most appropriate for the User. An Email Engine may be used to customize emails to the User so that topics in the email are presented in manner most appropriate for the User. A Support Entity Engine may also be used to route an incoming support inquiries from a User to an appropriate technical support person for the User.

Abstract: A Web site, through the use of a Rules Engine, determines an expertise level of a User for one or more topics on a Web page. The Rules Engine may analyze User related data, such as the search term used by the User to find the Web site, the past products purchased by the User, the path through the Web site taken by the User, the usage history by the User on the Web site, the demographics of the User and/or the self declared expertise level of the User, to determine an expertise level of the User for the topics on the Web page. A Display Engine may customize a Web page based on the expertise levels of a User so that topics on the Web page are presented in a manner most appropriate for the User. An Email Engine may be used to customize emails to the User so that topics in the email are presented in manner most appropriate for the User. A Support Entity Engine may also be used to route an incoming support inquiries from a User to an appropriate technical support person for the User.

Abstract: A Web site, through the use of a Rules Engine, determines an expertise level of a User for one or more topics on a Web page. The Rules Engine may analyze User related data, such as the search term used by the User to find the Web site, the past products purchased by the User, the path through the Web site taken by the User, the usage history by the User on the Web site, the demographics of the User and/or the self declared expertise level of the User, to determine an expertise level of the User for the topics on the Web page. A Display Engine may customize a Web page based on the expertise levels of a User so that topics on the Web page are presented in a manner most appropriate for the User. An Email Engine may be used to customize emails to the User so that topics in the email are presented in manner most appropriate for the User. A Support Entity Engine may also be used to route an incoming support inquiries from a User to an appropriate technical support person for the User.

Abstract: According to one aspect, a digital display unit includes a microcontroller to process digital information received from one or more sensors, a display, and a switch in electrical communication with the microcontroller so that the microcontroller displays an output on the display that is specific to a type of sensor. The type of sensor may be selected from a position sensor, a pressure sensor, and a stroke counter. The digital display unit may be part of a choke control panel. The microcontroller and the display may be disposed in an enclosure, and an electrical power source may be disposed in the enclosure to supply electrical power to the microcontroller and the one or more sensors. A digital hydraulic choke position sensor assembly and a digital pressure sensor assembly are also described, one or both of which may be used in a system for drilling an oil or gas well.

Abstract: A Web site, through the use of a Rules Engine, determines an expertise level of a User for one or more topics on a Web page. The Rules Engine may analyze User related data, such as the search term used by the User to find the Web site, the past products purchased by the User, the path through the Web site taken by the User, the usage history by the User on the Web site, the demographics of the User and/or the self declared expertise level of the User, to determine an expertise level of the User for the topics on the Web page. A Display Engine may customize a Web page based on the expertise levels of a User so that topics on the Web page are presented in a manner most appropriate for the User. An Email Engine may be used to customize emails to the User so that topics in the email are presented in manner most appropriate for the User. A Support Entity Engine may also be used to route an incoming support inquiries from a User to an appropriate technical support person for the User.

Abstract: A Web site, through the use of a Rules Engine, determines an expertise level of a User for one or more topics on a Web page. The Rules Engine may analyze User related data, such as the search term used by the User to find the Web site, the past products purchased by the User, the path through the Web site taken by the User, the usage history by the User on the Web site, the demographics of the User and/or the self declared expertise level of the User, to determine an expertise level of the User for the topics on the Web page. A Display Engine may customize a Web page based on the expertise levels of a User so that topics on the Web page are presented in a manner most appropriate for the User. An Email Engine may be used to customize emails to the User so that topics in the email are presented in manner most appropriate for the User. A Support Entity Engine may also be used to route an incoming support inquiries from a User to an appropriate technical support person for the User.

Abstract: A Web site, through the use of a Rules Engine, determines an expertise level of a User for one or more topics on a Web page. The Rules Engine may analyze User related data, such as the search term used by the User to find the Web site, the past products purchased by the User, the path through the Web site taken by the User, the usage history by the User on the Web site, the demographics of the User and/or the self declared expertise level of the User, to determine an expertise level of the User for the topics on the Web page. A Display Engine may customize a Web page based on the expertise levels of a User so that topics on the Web page are presented in a manner most appropriate for the User. An Email Engine may be used to customize emails to the User so that topics in the email are presented in manner most appropriate for the User. A Support Entity Engine may also be used to route an incoming support inquiries from a User to an appropriate technical support person for the User.

Abstract: A Web site, through the use of a Rules Engine, determines an expertise level of a User for one or more topics on a Web page. The Rules Engine may analyze User related data, such as the search term used by the User to find the Web site, the past products purchased by the User, the path through the Web site taken by the User, the usage history by the User on the Web site, the demographics of the User and/or the self declared expertise level of the User, to determine an expertise level of the User for the topics on the Web page. A Display Engine may customize a Web page based on the expertise levels of a User so that topics on the Web page are presented in a manner most appropriate for the User. An Email Engine may be used to customize emails to the User so that topics in the email are presented in manner most appropriate for the User. A Support Entity Engine may also be used to route an incoming support inquiries from a User to an appropriate technical support person for the User.

Abstract: A Web site, through the use of a Rules Engine, determines an expertise level of a User for one or more topics on a Web page. The Rules Engine may analyze User related data, such as the search term used by the User to find the Web site, the past products purchased by the User, the path through the Web site taken by the User, the usage history by the User on the Web site, the demographics of the User and/or the self declared expertise level of the User, to determine an expertise level of the User for the topics on the Web page. A Display Engine may customize a Web page based on the expertise levels of a User so that topics on the Web page are presented in a manner most appropriate for the User. An Email Engine may be used to customize emails to the User so that topics in the email are presented in manner most appropriate for the User. A Support Entity Engine may also be used to route an incoming support inquiries from a User to an appropriate technical support person for the User.

Abstract: A Web site, through the use of a Rules Engine, determines an expertise level of a User for one or more topics on a Web page. The Rules Engine may analyze User related data, such as the search term used by the User to find the Web site, the past products purchased by the User, the path through the Web site taken by the User, the usage history by the User on the Web site, the demographics of the User and/or the self declared expertise level of the User, to determine an expertise level of the User for the topics on the Web page. A Display Engine may customize a Web page based on the expertise levels of a User so that topics on the Web page are presented in a manner most appropriate for the User. An Email Engine may be used to customize emails to the User so that topics in the email are presented in manner most appropriate for the User. A Support Entity Engine may also be used to route an incoming support inquiries from a User to an appropriate technical support person for the User.

Abstract: A Web site, through the use of a Rules Engine, determines an expertise level of a User for one or more topics on a Web page. The Rules Engine may analyze User related data, such as the search term used by the User to find the Web site, the past products purchased by the User, the path through the Web site taken by the User, the usage history by the User on the Web site, the demographics of the User and/or the self declared expertise level of the User, to determine an expertise level of the User for the topics on the Web page. A Display Engine may customize a Web page based on the expertise levels of a User so that topics on the Web page are presented in a manner most appropriate for the User. An Email Engine may be used to customize emails to the User so that topics in the email are presented in manner most appropriate for the User. A Support Entity Engine may also be used to route an incoming support inquiries from a User to an appropriate technical support person for the User.