diff --git a/blog/2021-04-27-sse.md b/blog/2021-04-27-sse.md
index 35cdce29..01fad09c 100644
--- a/blog/2021-04-27-sse.md
+++ b/blog/2021-04-27-sse.md
@@ -39,7 +39,7 @@ In this way, you create and store encryption keys yourself. Different from Clien
 
 ## How to Use SSE in go-storage
 
-Since different services support different SSE options and have different behaviors, SSE-related pairs are considered service pairs. So you will have to check which options are provided for your specific service first. We listed supported options and related pairs in our service [docs]. You'd better first choose the SSE option you want to use, and then ignore other pairs in case of being confused with the usage of the pairs.
+Since different services support different SSE options and have different behaviors, SSE-related pairs are considered system pairs. So you will have to check which options are provided for your specific service first. We listed supported options and related pairs in our service [docs]. You'd better first choose the SSE option you want to use, and then ignore other pairs in case of being confused with the usage of the pairs.
 
 We recommend using SSE with [DefaultPairs], where you only provide SSE-related options during `NewStorager` and can write the same logic for different services. Take [s3] for example. The code snippets come from [go-storage-example]
 
diff --git a/blog/2021-06-04-weekly-report.md b/blog/2021-06-04-weekly-report.md
index 2023a70e..9b09818d 100644
--- a/blog/2021-06-04-weekly-report.md
+++ b/blog/2021-06-04-weekly-report.md
@@ -49,7 +49,7 @@ For more details, please refer to <https://beyondstorage.io/community/events/osp
 
 [specs]: https://github.com/beyondstorage/specs
 
-[go-service-qingsor]: https://github.com/beyondstorage/go-service-qingstor
+[go-service-qingstor]: https://github.com/beyondstorage/go-service-qingstor
 
 [GSP-47]: https://github.com/beyondstorage/specs/blob/master/rfcs/47-additional-error-specification.md
 
diff --git a/blog/2021-06-21-weekly-report.md b/blog/2021-06-21-weekly-report.md
index 5dd9bd85..6bad6a80 100644
--- a/blog/2021-06-21-weekly-report.md
+++ b/blog/2021-06-21-weekly-report.md
@@ -52,7 +52,7 @@ So users can get the storage's restrictions before really call the API.
 
 This week we approved and merged this GSP. The implementations could be tracked at [Tracking issue for GSP-97: Add Restrictions In Storage Metadata](https://github.com/beyondstorage/go-storage/issues/599).
 
-### Add Service Metadata In Storage Metadata
+### Add System Metadata In Storage Metadata
 
 [GSP-111](https://github.com/beyondstorage/specs/pull/111) is still under discussion.
 
diff --git a/docs/go-storage/internal/specs.md b/docs/go-storage/internal/specs.md
index 303fbb00..1c3067c1 100644
--- a/docs/go-storage/internal/specs.md
+++ b/docs/go-storage/internal/specs.md
@@ -73,7 +73,7 @@ func WithContentType(v string) Pair {
 We have two kind of pairs:
 
 - `Global Pair`: defined in [specs](https://github.com/beyondstorage/specs/blob/master/definitions/pairs.toml), could be used in all services.
-- `Service Pair`: defined in `service.toml`, could only be used in current service.
+- `System Pair`: defined in `service.toml`, could only be used in current service.
 
 All supported fields are following:
 
@@ -88,7 +88,7 @@ type = "int64"
 description = "specify size for this request, storage will only read limited content data"
 ```
 
-Example of adding service pair:
+Example of adding system pair:
 
 ```toml
 [pairs.force_path_style]
@@ -114,7 +114,7 @@ func (o *Object) MustGetContentLength() int64 {}
 We have two kind of info:
 
 - `Global Info`: defined in [specs](https://github.com/beyondstorage/specs/blob/master/definitions), could be used in all services.
-- `Service Info`: defined in `service.toml`, could only be used in current service.
+- `System Info`: defined in `service.toml`, could only be used in current service.
 
 All supported fields are following:
 
@@ -130,7 +130,7 @@ type = "string"
 export = true
 ```
 
-Example of adding service pair for object metadata:
+Example of adding system pair for object metadata:
 
 ```toml
 [infos.object.meta.storage-class]
@@ -232,7 +232,7 @@ func (s *Storage) convertWriteStorageClass(v string) (string, bool) {
 type = "bool"
 description = "see http://docs.aws.amazon.com/AmazonS3/latest/dev/VirtualHosting.html for Amazon S3: Virtual Hosting of Buckets"
 ```
-Service pairs, name should be `snack_case`
+System pairs, name should be `snack_case`
 
 ### `infos`
 
@@ -241,7 +241,7 @@ Service pairs, name should be `snack_case`
 type = "string"
 ```
 
-Service infos, name should be `kebab-case`
+System infos, name should be `kebab-case`
 
 [specs]: https://github.com/beyondstorage/specs
 [go-storage]: https://github.com/beyondstorage/go-storage
diff --git a/docs/go-storage/pairs/index.md b/docs/go-storage/pairs/index.md
index 2467f340..a8882334 100644
--- a/docs/go-storage/pairs/index.md
+++ b/docs/go-storage/pairs/index.md
@@ -8,11 +8,11 @@ sidebar_position: 1
 There are two kinds of `Pair`:
 
 - Global Pair: Defined in [specs](https://github.com/beyondstorage/specs/blob/master/definitions/pairs.toml), shared across all services.
-- Service Pair: Defined in service's `service.toml` pairs section, only available in current service.
+- System Pair: Defined in service's `service.toml` pairs section, only available in current service.
 
 ## Available Pairs
 
-We will document all global pair here and leave service pairs in service's documents.
+We will document all global pair here and leave system pairs in service's documents.
 
 - [content_md5](./content_md5/)
 - [content_type](./content_type/)
@@ -35,7 +35,7 @@ We will document all global pair here and leave service pairs in service's docum
 
 `go-storage` provides a mechanism to allow user pass default pairs for every operation during `NewServicer` and `NewStorager`.
 
-Any service that supports this mechanism will generate service pairs called  `DefaultServicePairs` and `DefaultStoragePairs`:
+Any service that supports this mechanism will generate system pairs called  `DefaultServicePairs` and `DefaultStoragePairs`:
 
 ```go
 type DefaultStoragePairs struct {