Raspberry Pi has upgraded its full-year profit outlook after reporting record first-half revenue and profitability, driven by strong demand from OEM customers and resellers, higher unit shipments and a favourable product mix.

Revenue for the six months to 30 June rose 90% to $256.9m, while adjusted earnings more than doubled, increasing 108% to $40.3m. Pre-tax profit climbed 216% to $19.6m from $6.2m a year earlier

For most employees, pension saving happens in the background. Contributions are paid in each month, but few people make an active investment choice.