Systemics Inc, the inventor and developer of Ricardo, has issued various units for its internal payments and trading purposes.
Systemics' Prepaid Services Series of Units:
| Name | Symbols | Contract | Balance Sheet | ||
| ps Dollar | PSD, $ | asc | html | Sheet | |
| ps Euro | psE, € | asc | html | Sheet | |
| ps Sterling | psQ, £ | asc | html | Sheet | |
| ps Gold | psG, gg | asc | html | Sheet | |
| Standard Terms | - | raw | html | - | |
Unusually, Systemics makes no claims about reserves for their "prepaid Services" family of contracts. Contractually, they are redeemable in services provided by Systemics.