# IBM 2361 Large Capacity Storage

> memory storage unit used with certain models of IBM System/360 mainframe

**Wikidata**: [Q5968604](https://www.wikidata.org/wiki/Q5968604)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/IBM_2361_Large_Capacity_Storage)  
**Source**: https://4ort.xyz/entity/ibm-2361-large-capacity-storage

## Summary
The IBM 2361 Large Capacity Storage was an external memory storage unit used with specific models of the IBM System/360 mainframe computer. It functioned as a high-capacity RAM cabinet designed to supplement the mainframe's core memory.

## Key Facts
- Designed and manufactured by IBM.
- Classified as a memory storage unit [class].
- Used as an external cabinet containing Random Access Memory (RAM).
- Compatible with certain models of the IBM System/360 mainframe computer family.
- Part of the computing hardware landscape of the 1960s and earlier large computer systems.
- Has specific Wikipedia pages in English and Norwegian languages.
- Associated with the Freebase ID `/m/0ch2c0q`.

## FAQs
### Q: What was the primary function of the IBM 2361 Large Capacity Storage?
A: The IBM 2361 served as an external memory storage unit, providing additional RAM capacity to supplement the core memory of specific IBM System/360 mainframe models.

### Q: When and for what system was the IBM 2361 Large Capacity Storage developed?
A: It was developed by IBM during the era of the System/360 mainframe family in the 1960s, designed for use with certain models within that line.

### Q: How did the IBM 2361 physically connect to the mainframe?
A: It functioned as a standalone external cabinet containing RAM, designed to connect physically and electronically to compatible IBM System/360 mainframes to provide additional memory resources.

### Q: What type of memory technology did the IBM 2361 utilize?
A: The IBM 2361 utilized Random Access Memory (RAM) technology within its external cabinet design.

## Why It Matters
The IBM 2361 Large Capacity Storage represents a significant step in the evolution of memory architecture for large-scale mainframe computing during the 1960s. As an external RAM unit, it addressed the critical need for expandable memory capacity in the nascent IBM System/360 family, allowing customers to configure systems with larger memory footprints as required by their applications. This modularity was crucial for the System/360's goal of offering a scalable range of computing power. The existence of such dedicated external storage units underscores the challenges and engineering solutions of the early mainframe era, where physical constraints and cost drove the need for separate, high-capacity memory cabinets. It plays a role in understanding the foundational hardware design philosophies that shaped subsequent generations of computing systems.

## Notable For
*   Being a specialized external memory storage unit explicitly designed for integration with specific IBM System/360 mainframe models.
*   Utilizing RAM technology within a freestanding cabinet format, distinct from the mainframe's core memory.
*   Serving as a clear example of the hardware design solutions employed in 1960s large-scale computing to provide expandable memory capacity.
*   Highlighting the physical scale and modularity of early mainframe storage components.

## Body
### Overview
The IBM 2361 Large Capacity Storage was a hardware component developed by IBM.
*   It belongs to the broader class of memory storage units.
*   Its primary function was to provide additional Random Access Memory (RAM) capacity.

### Compatibility
*   Specifically designed for use with certain models within the IBM System/360 mainframe computer family.
*   Functioned as an external cabinet physically separate from the mainframe unit itself.

### Physical Form and Technology
*   Constructed as an external cabinet.
*   Internally housed RAM memory modules.
*   Represented a solution for expanding the memory footprint of compatible System/360 installations beyond the base core memory capabilities.