ANOVA is short for ANalysis Of VAriance. The one-way analysis of variance (ANOVA) is used to determine whether there are any significant differences between the means of two or more independent (unrelated) groups (although you tend to only see it used when there are a minimum of three, rather than two groups).
For some statisticians the ANOVA doesn't end there - they assume a cause effect relationship and say that one or more independent, controlled variables (the factors) cause the significant difference of one or more characteristics. The way this works is that the factors sort the data points into one of the groups and therefore they cause the difference in the mean value of the groups.
The ANOVA can be found in SPSS in Analyze/Compare Means/One Way ANOVA.
You can figure up one-way ANOVE in SPSS on cloud.