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# 52ViKING help center

Examples, step-by-step procedures, useful tips, and background on how 52ViKING
works — for shop assistants at the till, for managers configuring a store, and
for developers who need to know what the API field names actually mean.

If you are integrating, the fastest route in is usually
[Platform concepts](/help/concepts/re) for the model, then
[Store Management](/help/store-management/wsa) for how each entity is
configured.

## Browse by section

| Section                                        | Topics | Covers                                                                                                 |
| ---------------------------------------------- | ------ | ------------------------------------------------------------------------------------------------------ |
| [Platform concepts](/help/concepts/re)         | 12     | Discount types, payment methods, self-scanning, credit sales, returns, balance and bookkeeping         |
| [Store Management](/help/store-management/wsa) | 39     | The full configuration surface: articles, campaigns, discount groups, operators, tills, reports, stock |
| [ViKING POS](/help/pos/wpu)                    | 14     | The staffed till: sales, returns, till management, customers, campaigns, SCO, monitoring               |
| [ViKING MPOS](/help/mpos/mo)                   | 6      | Mobile POS on Android, deployment via MDM                                                              |
| [Emergency POS](/help/emergency-pos/epos)      | 4      | Setup, activation, and recovery                                                                        |
| [POS Designer](/help/pos-designer/wpud)        | 9      | Diagrams, layouts, components, resources                                                               |
| [Unified commerce](/help/unified-commerce/mp)  | 2      | Cross-channel commerce and the cloud APIs                                                              |
| [52LEASING](/help/leasing/le)                  | 1      | Danish-only; see the note on that page                                                                 |
| [52eSELLER](/help/eseller/es)                  | 1      | The e-commerce suite                                                                                   |
| [About this help](/help/about/help-help)       | 4      | Using the help, contact, trademarks                                                                    |

Recently added and updated topics are in [What's new](/docs/changelog).

## Concepts developers ask about most

Configuring promotions through [Master Data](/api/master-data/overview) takes two things at
once: the endpoint schema, and the topic explaining what a discount group's Buy
side actually is.

#### [Discount groups](/help/store-management/discount-groups)

What the rule looks like in Store Management.

#### [Buy side / Get side](/help/store-management/discount-groups-buyget)

Which articles trigger, which receive.

#### [Discount types](/help/concepts/discount-types)

Mix, amount, ladder, percent-of-cheapest.