2fc

2FC is an acronym used across different domains, and there is no single, universally accepted meaning. Its interpretation depends heavily on context, and in many cases the term is used informally or as a shorthand within a specific field or by a particular author.

In machine learning and neural network literature, 2FC frequently stands for two fully connected layers. This shorthand is used to describe a simple classifier head or a small neural network segment that follows one or more convolutional or pooling layers. A typical interpretation is that the architecture includes two linear (fully connected) layers, often with a nonlinearity between them, culminating in an output layer suitable for the task at hand. The exact dimensions and activation functions are determined by the design goals and dataset.

Beyond computing, 2FC can appear as a model name, catalog code, or internal designation in various industries. Because there is no universal standard, the meaning of 2FC in such contexts must be derived from adjacent documentation, schematics, or product literature.

In scientific writing, abbreviations based on initials can be used for convenience, but 2FC is not a fixed term with a fixed definition across disciplines. Readers should consult the source material to determine the intended meaning in a given instance.

See also: two-factor authentication (2FA), which is a distinct concept and is not generally abbreviated as 2FC.