This is a very short literature review on fault-tolerant systems.
I have collected up the information related with our research as closely as possible.
This review does not include however anything on aspect programming,
FT transformations, etc. The purpose of this short paper is
1) To collect summaries of the related Fault-Tolerance papers
2) To be able to define the FT techniques that are possible to implement as aspects
and decide about their implementation methods in detail, before going into
aspect programming.