This tag is used for software related questions about using USB-to-serial Bridges and Adapters. Hardware adapters attach a peripheral with a DB-9 or DB-25 connector to a USB connector on a PC or other host. Software or virtual adapters are drivers in the host which create a COM port interface to a USB connection allowing software to open the virtual COM port to a device attached to the USB connector.

Code signing is a security technology, used in OS X, that allows you to certify that an app was created by you. Once an app is signed, the system can detect any change to the app—whether the change is introduced accidentally or by malicious code.

Is an approach to authentication which requires the presentation of two or more authentication factors.

Status bars display a collection of status items that provide interaction with or feedback to the user, such as a menu or an image reflecting an application’s state. A system-wide status bar resides at the right side of the menu bar and is the only status bar currently available.

Native Client (NaCl) and Portable Native Client (PNaCl) are open-source technologies for executing compiled code in a browser sandbox. PNaCl is portable and preferred but has a few limitations. Questions about the tool chain and SDK for Native Client as well as questions concerning behaviors of the resulting applications should use this tag. Questions involving HTML and JavaScript components used with Native Client may need those tags as well or instead.

`geom_text` is the geometric object description for creating text-labels in a plot in `ggplot2`

In mathematics, a coefficient is a multiplicative factor in some term of a polynomial, a series or any expression; it is usually a number, but in any case does not involve any variables of the expression.

Mesosphere (now D2iq) was a company that productized Apache Mesos, the Marathon scheduler, and other applications to support Mesos applications and infrastructure inside their DCOS software.

A `PHAsset` is an object in the iOS Photos Framework (aka PhotoKit) that represents an image or video file on the iOS device.

Multiple imputation using Fully Conditional Specification (FCS) implemented by the MICE algorithm. Each variable has its own imputation model. Built-in imputation models are provided for continuous data (predictive mean matching, normal), binary data (logistic regression), unordered categorical data (polytomous logistic regression) and ordered categorical data (proportional odds).

Dart HTML allows access to basic browser features like the DOM, FileSystem, Websockets and other things.