General day-to-day work - I provide online marketing services and having a computer (and different accessories like mice, keyboard, headset) is essential.
The main questions is whether you expense these items or you treat them as a capital asset.
Larger items of equipment, that will be useful for more than a year and are expensive in the context of your business, would normally be categorised as a “Capital Asset”.
If you want to post a computer part/peripheral as an asset you can use the nominal account “Office Equipment”.
If you want to post to an expense account you can use “Hosting Fees and IT Consumables”