H.S. Bluston About Roles Name : H.S. Bluston Book Role Engineering & Scientific Applications of the ZX81/Spectrum Computers, The Author Aerospace Applications of the Spectrum Computer Author Change Request You can request changes or additions here. You can upload files. All change requests are actioned as quickly as possible and you will be informed of the result. Details Files Your Name * Email * Details Your browser doesn't have Flash, Silverlight or HTML5 support. Submit Thank you for your change request. We will respond as soon as possible.