# Trezor device naming in codebase

Development/Internal name consists of 4 keys
<`product_class`> <`platform`> <`feature_class`> <`generation`>

- `product_class` - `'T'` for Trezor hardware wallet
- `platform` - `'1'` for STM32F207, `'2'` for STM32F42x
- `feature_class` - `'B'` for Buttons, `'T'` for Touch
- `generation`

| Official name  | Development name |
| :------------: | :--------------: |
| Trezor Model 1 |       T1B1       |
| Trezor Model T |       T2T1       |
| Trezor Safe 3  |    T2B1, T3B1    |
| Trezor Safe 5  |       T3T1       |
| Trezor Safe 7  |       T3W1       |

- Trezor Safe 3 exists in two variants, depending on its chip. It was upgraded post-release.