> For the complete documentation index, see [llms.txt](https://docs.patcher.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.patcher.xyz/reference/modular-glossary.md).

# Modular Glossary

This glossary is intentionally short and practical. It focuses on terms that matter while using Patcher.

## Analysis modes

Views that read a rack from different angles — power, function, layout, and signal. Layout mode adds suggestions such as Same HP fits, Combos, Remix, and Shuffle when there is enough module data to work with. See [Racks](/core-workflows/racks.md).

## Collection

The list of modules you have saved as part of your own workspace. In Patcher, the collection powers racks, patches, and manual shortcuts.

## Digital twin

A practical digital representation of your real modular setup. In Patcher, that means your saved modules, racks, patches, and related context staying connected instead of being spread across separate tools.

## HP

The horizontal unit used to size Eurorack modules — one HP is roughly five millimeters wide. Rack layouts add up to a fixed HP width per row, so a module that "fits Same HP" is a module that occupies exactly the same slot width as another.

## Instance

A specific copy of a module inside a patch. Patcher is instance-aware: when the same module appears more than once, each copy is a numbered instance so connections can target the intended copy rather than collapsing into a single generic reference.

## Manual

The reference document for a module — usually the manufacturer's PDF. In Patcher, manual links attach to module records and aggregate in the [User Area](/core-workflows/user-area.md) so a growing collection turns into one searchable list. See [Manuals](/core-workflows/manuals.md).

## Module

A single hardware unit in a modular system. In Patcher, module pages can include size, manufacturer, power information, panel images, manuals, and related public usage.

## Panel variant

An alternate visual version of the same module. This can matter when you want a rack plan to match the real hardware you actually own.

## Patch

A saved record of a modular setup or signal-routing idea. In Patcher, a patch can include modules, connections, names, and notes for later recall.

## Public profile

A shareable page tied to a user's username, addressable at `/u/:username`. It can show selected public racks and patches, plus profile-related stats.

## Rack

A saved case or layout plan. In Patcher, a rack is not just a picture — it can be edited, rearranged, analyzed, and shared.

## Recall

The ability to reopen an old session and still understand what mattered. This is one of the main reasons to document patches and racks carefully.

## Share URL

The link that opens a public rack, patch, or profile. Patcher uses opaque `public_id` share URLs; older numeric links redirect for public items and are retired for private items.

## User Area

Your signed-in workspace inside Patcher. It brings together your modules, racks, patches, manuals, comments, and search.