EOM

EOM is an acronym with several meanings across different domains. The most common are End of Message, End of Month, Electro-Optic Modulator, and Extraocular Muscles, with the intended sense determined by context.

End of Message refers to a convention in email and messaging used to indicate that no further content follows the message body. It is often appended to the subject line or at the end of the message to signal that the sender has finished. While convenient, it can be misunderstood if important information requires a reply or if the formatting is not displayed consistently by all clients.

End of Month denotes the closing of financial records at the end of a calendar or reporting month. It marks the time to tally transactions, generate statements, and produce internal or external reports. EOM deadlines organize workflows in accounting, payroll, and budgeting, and are typically defined in company policies or compliance requirements.

Electro-Optic Modulator is a device that uses the electro-optic effect to control a light beam with an electric signal. Common materials include lithium niobate, and devices such as Pockels cells modulate amplitude, phase, or polarization. EOMs enable high-speed modulation of signals in fiber-optic communications and photonic systems, with performance influenced by bandwidth, drive voltage, and temperature stability.

Extraocular Muscles are the six muscles that move the eyeball: superior rectus, inferior rectus, medial rectus, lateral rectus, superior oblique, and inferior oblique. They coordinate gaze, stabilize fixation, and are assessed in ophthalmologic examinations for eye movement disorders such as strabismus or ophthalmoplegia.

Other specialized meanings exist in fields like spaceflight and project management, where End of Mission or similar terms may be abbreviated as EOM.